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Finding the Fourth Proportional to 81,089.52, 111,890.16 and 45,273.76

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Solution

The fourth proportional to 81,089.52, 111,890.16 and 45,273.76 is: 62,470.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,089.52 : 111,890.16 = 45,273.76 : x
  2. Step 2: Convert to fraction form
    81,089.52/111,890.16 = 45,273.76/x
  3. Step 3: Cross multiply
    81,089.52x = 111,890.16 × 45,273.76
  4. Step 4: Simplify right side
    81,089.52x = 5,065,688,250.20
  5. Step 5: Solve for x
    x = 5,065,688,250.20/81,089.52
  6. Step 6: Final answer
    x = 62,470.32

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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.