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Finding the Fourth Proportional to 81,750.65, 112,818.74 and 45,939.93

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Solution

The fourth proportional to 81,750.65, 112,818.74 and 45,939.93 is: 63,398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,750.65 : 112,818.74 = 45,939.93 : x
  2. Step 2: Convert to fraction form
    81,750.65/112,818.74 = 45,939.93/x
  3. Step 3: Cross multiply
    81,750.65x = 112,818.74 × 45,939.93
  4. Step 4: Simplify right side
    81,750.65x = 5,182,884,788.59
  5. Step 5: Solve for x
    x = 5,182,884,788.59/81,750.65
  6. Step 6: Final answer
    x = 63,398.70

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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.