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Finding the Fourth Proportional to 92,321.70, 138,190.95 and 72,492.90

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Solution

The fourth proportional to 92,321.70, 138,190.95 and 72,492.90 is: 108,510.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,321.70 : 138,190.95 = 72,492.90 : x
  2. Step 2: Convert to fraction form
    92,321.70/138,190.95 = 72,492.90/x
  3. Step 3: Cross multiply
    92,321.70x = 138,190.95 × 72,492.90
  4. Step 4: Simplify right side
    92,321.70x = 10,017,862,719.26
  5. Step 5: Solve for x
    x = 10,017,862,719.26/92,321.70
  6. Step 6: Final answer
    x = 108,510.38

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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.