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Finding the Fourth Proportional to 128,060.84, 176,747.09 and 76,381.25

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Solution

The fourth proportional to 128,060.84, 176,747.09 and 76,381.25 is: 105,419.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,060.84 : 176,747.09 = 76,381.25 : x
  2. Step 2: Convert to fraction form
    128,060.84/176,747.09 = 76,381.25/x
  3. Step 3: Cross multiply
    128,060.84x = 176,747.09 × 76,381.25
  4. Step 4: Simplify right side
    128,060.84x = 13,500,162,402.42
  5. Step 5: Solve for x
    x = 13,500,162,402.42/128,060.84
  6. Step 6: Final answer
    x = 105,419.92

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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.