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Finding the Fourth Proportional to 156,978.92, 216,626.33 and 89,002.17

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Solution

The fourth proportional to 156,978.92, 216,626.33 and 89,002.17 is: 122,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,978.92 : 216,626.33 = 89,002.17 : x
  2. Step 2: Convert to fraction form
    156,978.92/216,626.33 = 89,002.17/x
  3. Step 3: Cross multiply
    156,978.92x = 216,626.33 × 89,002.17
  4. Step 4: Simplify right side
    156,978.92x = 19,280,213,671.64
  5. Step 5: Solve for x
    x = 19,280,213,671.64/156,978.92
  6. Step 6: Final answer
    x = 122,820.40

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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.