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Finding the Fourth Proportional to 100,909.32, 139,254.90 and 58,492.44

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Solution

The fourth proportional to 100,909.32, 139,254.90 and 58,492.44 is: 80,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,909.32 : 139,254.90 = 58,492.44 : x
  2. Step 2: Convert to fraction form
    100,909.32/139,254.90 = 58,492.44/x
  3. Step 3: Cross multiply
    100,909.32x = 139,254.90 × 58,492.44
  4. Step 4: Simplify right side
    100,909.32x = 8,145,358,882.96
  5. Step 5: Solve for x
    x = 8,145,358,882.96/100,909.32
  6. Step 6: Final answer
    x = 80,719.59

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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.