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Finding the Fourth Proportional to 128,901.24, 177,883.30 and 71,549.24

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Solution

The fourth proportional to 128,901.24, 177,883.30 and 71,549.24 is: 98,737.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,901.24 : 177,883.30 = 71,549.24 : x
  2. Step 2: Convert to fraction form
    128,901.24/177,883.30 = 71,549.24/x
  3. Step 3: Cross multiply
    128,901.24x = 177,883.30 × 71,549.24
  4. Step 4: Simplify right side
    128,901.24x = 12,727,414,923.69
  5. Step 5: Solve for x
    x = 12,727,414,923.69/128,901.24
  6. Step 6: Final answer
    x = 98,737.72

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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.