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Finding the Fourth Proportional to 100,950.32, 139,253.64 and 63,158.96

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Solution

The fourth proportional to 100,950.32, 139,253.64 and 63,158.96 is: 87,123.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,950.32 : 139,253.64 = 63,158.96 : x
  2. Step 2: Convert to fraction form
    100,950.32/139,253.64 = 63,158.96/x
  3. Step 3: Cross multiply
    100,950.32x = 139,253.64 × 63,158.96
  4. Step 4: Simplify right side
    100,950.32x = 8,795,115,078.61
  5. Step 5: Solve for x
    x = 8,795,115,078.61/100,950.32
  6. Step 6: Final answer
    x = 87,123.20

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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.