Home / 81,332.10-121,998.15-28,746.90

Finding the Fourth Proportional to 81,332.10, 121,998.15 and 28,746.90

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Solution

The fourth proportional to 81,332.10, 121,998.15 and 28,746.90 is: 43,120.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,332.10 : 121,998.15 = 28,746.90 : x
  2. Step 2: Convert to fraction form
    81,332.10/121,998.15 = 28,746.90/x
  3. Step 3: Cross multiply
    81,332.10x = 121,998.15 × 28,746.90
  4. Step 4: Simplify right side
    81,332.10x = 3,507,068,618.24
  5. Step 5: Solve for x
    x = 3,507,068,618.24/81,332.10
  6. Step 6: Final answer
    x = 43,120.35

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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.