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Finding the Fourth Proportional to 156,752.86, 216,320.53 and 85,134.28

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Solution

The fourth proportional to 156,752.86, 216,320.53 and 85,134.28 is: 117,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,752.86 : 216,320.53 = 85,134.28 : x
  2. Step 2: Convert to fraction form
    156,752.86/216,320.53 = 85,134.28/x
  3. Step 3: Cross multiply
    156,752.86x = 216,320.53 × 85,134.28
  4. Step 4: Simplify right side
    156,752.86x = 18,416,291,489.17
  5. Step 5: Solve for x
    x = 18,416,291,489.17/156,752.86
  6. Step 6: Final answer
    x = 117,486.16

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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.