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Finding the Fourth Proportional to 120,141.12, 165,807.12 and 69,155.76

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Solution

The fourth proportional to 120,141.12, 165,807.12 and 69,155.76 is: 95,442.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,141.12 : 165,807.12 = 69,155.76 : x
  2. Step 2: Convert to fraction form
    120,141.12/165,807.12 = 69,155.76/x
  3. Step 3: Cross multiply
    120,141.12x = 165,807.12 × 69,155.76
  4. Step 4: Simplify right side
    120,141.12x = 11,466,517,397.01
  5. Step 5: Solve for x
    x = 11,466,517,397.01/120,141.12
  6. Step 6: Final answer
    x = 95,442.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.