Home / 100,892.47-139,232.55-55,570.61

Finding the Fourth Proportional to 100,892.47, 139,232.55 and 55,570.61

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Solution

The fourth proportional to 100,892.47, 139,232.55 and 55,570.61 is: 76,687.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,892.47 : 139,232.55 = 55,570.61 : x
  2. Step 2: Convert to fraction form
    100,892.47/139,232.55 = 55,570.61/x
  3. Step 3: Cross multiply
    100,892.47x = 139,232.55 × 55,570.61
  4. Step 4: Simplify right side
    100,892.47x = 7,737,238,135.96
  5. Step 5: Solve for x
    x = 7,737,238,135.96/100,892.47
  6. Step 6: Final answer
    x = 76,687.97

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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.