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Finding the Fourth Proportional to 128,073.29, 176,724.83 and 71,487.05

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Solution

The fourth proportional to 128,073.29, 176,724.83 and 71,487.05 is: 98,643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,073.29 : 176,724.83 = 71,487.05 : x
  2. Step 2: Convert to fraction form
    128,073.29/176,724.83 = 71,487.05/x
  3. Step 3: Cross multiply
    128,073.29x = 176,724.83 × 71,487.05
  4. Step 4: Simplify right side
    128,073.29x = 12,633,535,517.39
  5. Step 5: Solve for x
    x = 12,633,535,517.39/128,073.29
  6. Step 6: Final answer
    x = 98,643.02

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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.