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Finding the Fourth Proportional to 65,335.20, 90,182.88 and 51,930.24

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Solution

The fourth proportional to 65,335.20, 90,182.88 and 51,930.24 is: 71,679.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,335.20 : 90,182.88 = 51,930.24 : x
  2. Step 2: Convert to fraction form
    65,335.20/90,182.88 = 51,930.24/x
  3. Step 3: Cross multiply
    65,335.20x = 90,182.88 × 51,930.24
  4. Step 4: Simplify right side
    65,335.20x = 4,683,218,602.29
  5. Step 5: Solve for x
    x = 4,683,218,602.29/65,335.20
  6. Step 6: Final answer
    x = 71,679.87

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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.