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Finding the Fourth Proportional to 92,210.40, 138,445.20 and 72,511.20

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Solution

The fourth proportional to 92,210.40, 138,445.20 and 72,511.20 is: 108,868.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,210.40 : 138,445.20 = 72,511.20 : x
  2. Step 2: Convert to fraction form
    92,210.40/138,445.20 = 72,511.20/x
  3. Step 3: Cross multiply
    92,210.40x = 138,445.20 × 72,511.20
  4. Step 4: Simplify right side
    92,210.40x = 10,038,827,586.24
  5. Step 5: Solve for x
    x = 10,038,827,586.24/92,210.40
  6. Step 6: Final answer
    x = 108,868.71

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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.