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Finding the Fourth Proportional to 84,602.70, 127,050.30 and 81,978.30

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Solution

The fourth proportional to 84,602.70, 127,050.30 and 81,978.30 is: 123,109.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,602.70 : 127,050.30 = 81,978.30 : x
  2. Step 2: Convert to fraction form
    84,602.70/127,050.30 = 81,978.30/x
  3. Step 3: Cross multiply
    84,602.70x = 127,050.30 × 81,978.30
  4. Step 4: Simplify right side
    84,602.70x = 10,415,367,608.49
  5. Step 5: Solve for x
    x = 10,415,367,608.49/84,602.70
  6. Step 6: Final answer
    x = 123,109.16

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1.5x scale

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.