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Finding the Fourth Proportional to 128,476.17, 177,277.55 and 73,285.97

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Solution

The fourth proportional to 128,476.17, 177,277.55 and 73,285.97 is: 101,123.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,476.17 : 177,277.55 = 73,285.97 : x
  2. Step 2: Convert to fraction form
    128,476.17/177,277.55 = 73,285.97/x
  3. Step 3: Cross multiply
    128,476.17x = 177,277.55 × 73,285.97
  4. Step 4: Simplify right side
    128,476.17x = 12,991,955,958.16
  5. Step 5: Solve for x
    x = 12,991,955,958.16/128,476.17
  6. Step 6: Final answer
    x = 101,123.47

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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.