Home / 81,257.78-112,126.68-45,447.08

Finding the Fourth Proportional to 81,257.78, 112,126.68 and 45,447.08

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Solution

The fourth proportional to 81,257.78, 112,126.68 and 45,447.08 is: 62,711.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,257.78 : 112,126.68 = 45,447.08 : x
  2. Step 2: Convert to fraction form
    81,257.78/112,126.68 = 45,447.08/x
  3. Step 3: Cross multiply
    81,257.78x = 112,126.68 × 45,447.08
  4. Step 4: Simplify right side
    81,257.78x = 5,095,829,635.46
  5. Step 5: Solve for x
    x = 5,095,829,635.46/81,257.78
  6. Step 6: Final answer
    x = 62,711.90

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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.