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Finding the Fourth Proportional to 84,978,209.70, 127,467,314.55 and 78,459,200.10

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Solution

The fourth proportional to 84,978,209.70, 127,467,314.55 and 78,459,200.10 is: 117,688,800.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,978,209.70 : 127,467,314.55 = 78,459,200.10 : x
  2. Step 2: Convert to fraction form
    84,978,209.70/127,467,314.55 = 78,459,200.10/x
  3. Step 3: Cross multiply
    84,978,209.70x = 127,467,314.55 × 78,459,200.10
  4. Step 4: Simplify right side
    84,978,209.70x = 10,000,983,538,488,090
  5. Step 5: Solve for x
    x = 10,000,983,538,488,090/84,978,209.70
  6. Step 6: Final answer
    x = 117,688,800.15

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.