Home / 100,892.07-139,231.05-58,475.21

Finding the Fourth Proportional to 100,892.07, 139,231.05 and 58,475.21

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Solution

The fourth proportional to 100,892.07, 139,231.05 and 58,475.21 is: 80,695.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,892.07 : 139,231.05 = 58,475.21 : x
  2. Step 2: Convert to fraction form
    100,892.07/139,231.05 = 58,475.21/x
  3. Step 3: Cross multiply
    100,892.07x = 139,231.05 × 58,475.21
  4. Step 4: Simplify right side
    100,892.07x = 8,141,564,191.12
  5. Step 5: Solve for x
    x = 8,141,564,191.12/100,892.07
  6. Step 6: Final answer
    x = 80,695.78

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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.