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Finding the Fourth Proportional to 113,857.68, 156,775.78 and 103,177.83

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Solution

The fourth proportional to 113,857.68, 156,775.78 and 103,177.83 is: 142,070.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,857.68 : 156,775.78 = 103,177.83 : x
  2. Step 2: Convert to fraction form
    113,857.68/156,775.78 = 103,177.83/x
  3. Step 3: Cross multiply
    113,857.68x = 156,775.78 × 103,177.83
  4. Step 4: Simplify right side
    113,857.68x = 16,175,784,776.96
  5. Step 5: Solve for x
    x = 16,175,784,776.96/113,857.68
  6. Step 6: Final answer
    x = 142,070.21

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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.