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Finding the Fourth Proportional to 65,476.13, 90,352.80 and 38,612.48

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Solution

The fourth proportional to 65,476.13, 90,352.80 and 38,612.48 is: 53,282.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,476.13 : 90,352.80 = 38,612.48 : x
  2. Step 2: Convert to fraction form
    65,476.13/90,352.80 = 38,612.48/x
  3. Step 3: Cross multiply
    65,476.13x = 90,352.80 × 38,612.48
  4. Step 4: Simplify right side
    65,476.13x = 3,488,745,231.18
  5. Step 5: Solve for x
    x = 3,488,745,231.18/65,476.13
  6. Step 6: Final answer
    x = 53,282.71

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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.