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Finding the Fourth Proportional to 103,673.52, 142,938.68 and 67,806.72

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Solution

The fourth proportional to 103,673.52, 142,938.68 and 67,806.72 is: 93,487.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,673.52 : 142,938.68 = 67,806.72 : x
  2. Step 2: Convert to fraction form
    103,673.52/142,938.68 = 67,806.72/x
  3. Step 3: Cross multiply
    103,673.52x = 142,938.68 × 67,806.72
  4. Step 4: Simplify right side
    103,673.52x = 9,692,202,712.90
  5. Step 5: Solve for x
    x = 9,692,202,712.90/103,673.52
  6. Step 6: Final answer
    x = 93,487.74

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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.