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Finding the Fourth Proportional to 81,259.38, 112,143.80 and 45,460.91

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Solution

The fourth proportional to 81,259.38, 112,143.80 and 45,460.91 is: 62,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.38 : 112,143.80 = 45,460.91 : x
  2. Step 2: Convert to fraction form
    81,259.38/112,143.80 = 45,460.91/x
  3. Step 3: Cross multiply
    81,259.38x = 112,143.80 × 45,460.91
  4. Step 4: Simplify right side
    81,259.38x = 5,098,159,592.87
  5. Step 5: Solve for x
    x = 5,098,159,592.87/81,259.38
  6. Step 6: Final answer
    x = 62,739.34

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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.