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Finding the Fourth Proportional to 92,938.20, 139,407.30 and 30,600.60

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Solution

The fourth proportional to 92,938.20, 139,407.30 and 30,600.60 is: 45,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,938.20 : 139,407.30 = 30,600.60 : x
  2. Step 2: Convert to fraction form
    92,938.20/139,407.30 = 30,600.60/x
  3. Step 3: Cross multiply
    92,938.20x = 139,407.30 × 30,600.60
  4. Step 4: Simplify right side
    92,938.20x = 4,265,947,024.38
  5. Step 5: Solve for x
    x = 4,265,947,024.38/92,938.20
  6. Step 6: Final answer
    x = 45,900.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.