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Finding the Fourth Proportional to 65,750.92, 90,737.88 and 39,909.76

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Solution

The fourth proportional to 65,750.92, 90,737.88 and 39,909.76 is: 55,076.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,750.92 : 90,737.88 = 39,909.76 : x
  2. Step 2: Convert to fraction form
    65,750.92/90,737.88 = 39,909.76/x
  3. Step 3: Cross multiply
    65,750.92x = 90,737.88 × 39,909.76
  4. Step 4: Simplify right side
    65,750.92x = 3,621,327,013.71
  5. Step 5: Solve for x
    x = 3,621,327,013.71/65,750.92
  6. Step 6: Final answer
    x = 55,076.45

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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.