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Finding the Fourth Proportional to 100,948.32, 139,250.88 and 63,156.96

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Solution

The fourth proportional to 100,948.32, 139,250.88 and 63,156.96 is: 87,120.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,948.32 : 139,250.88 = 63,156.96 : x
  2. Step 2: Convert to fraction form
    100,948.32/139,250.88 = 63,156.96/x
  3. Step 3: Cross multiply
    100,948.32x = 139,250.88 × 63,156.96
  4. Step 4: Simplify right side
    100,948.32x = 8,794,662,258.12
  5. Step 5: Solve for x
    x = 8,794,662,258.12/100,948.32
  6. Step 6: Final answer
    x = 87,120.44

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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.