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Finding the Fourth Proportional to 84,400.90, 126,564.90 and 42,264.70

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Solution

The fourth proportional to 84,400.90, 126,564.90 and 42,264.70 is: 63,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,400.90 : 126,564.90 = 42,264.70 : x
  2. Step 2: Convert to fraction form
    84,400.90/126,564.90 = 42,264.70/x
  3. Step 3: Cross multiply
    84,400.90x = 126,564.90 × 42,264.70
  4. Step 4: Simplify right side
    84,400.90x = 5,349,227,529.03
  5. Step 5: Solve for x
    x = 5,349,227,529.03/84,400.90
  6. Step 6: Final answer
    x = 63,378.80

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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.