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Finding the Fourth Proportional to 92,909.97, 128,157.93 and 77,347.89

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Solution

The fourth proportional to 92,909.97, 128,157.93 and 77,347.89 is: 106,691.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,909.97 : 128,157.93 = 77,347.89 : x
  2. Step 2: Convert to fraction form
    92,909.97/128,157.93 = 77,347.89/x
  3. Step 3: Cross multiply
    92,909.97x = 128,157.93 × 77,347.89
  4. Step 4: Simplify right side
    92,909.97x = 9,912,745,472.27
  5. Step 5: Solve for x
    x = 9,912,745,472.27/92,909.97
  6. Step 6: Final answer
    x = 106,691.95

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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.