Home / 92,001.20-138,001.80-77,129.60

Finding the Fourth Proportional to 92,001.20, 138,001.80 and 77,129.60

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Solution

The fourth proportional to 92,001.20, 138,001.80 and 77,129.60 is: 115,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,001.20 : 138,001.80 = 77,129.60 : x
  2. Step 2: Convert to fraction form
    92,001.20/138,001.80 = 77,129.60/x
  3. Step 3: Cross multiply
    92,001.20x = 138,001.80 × 77,129.60
  4. Step 4: Simplify right side
    92,001.20x = 10,644,023,633.28
  5. Step 5: Solve for x
    x = 10,644,023,633.28/92,001.20
  6. Step 6: Final answer
    x = 115,694.40

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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.