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Finding the Fourth Proportional to 128,155.27, 176,848.62 and 71,565.43

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Solution

The fourth proportional to 128,155.27, 176,848.62 and 71,565.43 is: 98,757.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,155.27 : 176,848.62 = 71,565.43 : x
  2. Step 2: Convert to fraction form
    128,155.27/176,848.62 = 71,565.43/x
  3. Step 3: Cross multiply
    128,155.27x = 176,848.62 × 71,565.43
  4. Step 4: Simplify right side
    128,155.27x = 12,656,247,535.21
  5. Step 5: Solve for x
    x = 12,656,247,535.21/128,155.27
  6. Step 6: Final answer
    x = 98,757.14

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