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Finding the Fourth Proportional to 66,789.60, 92,140.92 and 38,478.48

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Solution

The fourth proportional to 66,789.60, 92,140.92 and 38,478.48 is: 53,083.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,789.60 : 92,140.92 = 38,478.48 : x
  2. Step 2: Convert to fraction form
    66,789.60/92,140.92 = 38,478.48/x
  3. Step 3: Cross multiply
    66,789.60x = 92,140.92 × 38,478.48
  4. Step 4: Simplify right side
    66,789.60x = 3,545,442,547.40
  5. Step 5: Solve for x
    x = 3,545,442,547.40/66,789.60
  6. Step 6: Final answer
    x = 53,083.75

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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.