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Finding the Fourth Proportional to 66,920.48, 92,348.56 and 38,630.88

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Solution

The fourth proportional to 66,920.48, 92,348.56 and 38,630.88 is: 53,309.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920.48 : 92,348.56 = 38,630.88 : x
  2. Step 2: Convert to fraction form
    66,920.48/92,348.56 = 38,630.88/x
  3. Step 3: Cross multiply
    66,920.48x = 92,348.56 × 38,630.88
  4. Step 4: Simplify right side
    66,920.48x = 3,567,506,139.53
  5. Step 5: Solve for x
    x = 3,567,506,139.53/66,920.48
  6. Step 6: Final answer
    x = 53,309.63

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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.