Home / 81,715.52-112,778-45,905.52

Finding the Fourth Proportional to 81,715.52, 112,778 and 45,905.52

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Solution

The fourth proportional to 81,715.52, 112,778 and 45,905.52 is: 63,355.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.52 : 112,778 = 45,905.52 : x
  2. Step 2: Convert to fraction form
    81,715.52/112,778 = 45,905.52/x
  3. Step 3: Cross multiply
    81,715.52x = 112,778 × 45,905.52
  4. Step 4: Simplify right side
    81,715.52x = 5,177,132,734.56
  5. Step 5: Solve for x
    x = 5,177,132,734.56/81,715.52
  6. Step 6: Final answer
    x = 63,355.56

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1.5x scale

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.