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Finding the Fourth Proportional to 65,781.06, 90,770.86 and 38,924.70

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Solution

The fourth proportional to 65,781.06, 90,770.86 and 38,924.70 is: 53,711.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781.06 : 90,770.86 = 38,924.70 : x
  2. Step 2: Convert to fraction form
    65,781.06/90,770.86 = 38,924.70/x
  3. Step 3: Cross multiply
    65,781.06x = 90,770.86 × 38,924.70
  4. Step 4: Simplify right side
    65,781.06x = 3,533,228,494.24
  5. Step 5: Solve for x
    x = 3,533,228,494.24/65,781.06
  6. Step 6: Final answer
    x = 53,711.94

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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.