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Finding the Fourth Proportional to 81,422.38, 112,369.80 and 45,611.92

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Solution

The fourth proportional to 81,422.38, 112,369.80 and 45,611.92 is: 62,948.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,422.38 : 112,369.80 = 45,611.92 : x
  2. Step 2: Convert to fraction form
    81,422.38/112,369.80 = 45,611.92/x
  3. Step 3: Cross multiply
    81,422.38x = 112,369.80 × 45,611.92
  4. Step 4: Simplify right side
    81,422.38x = 5,125,402,328.02
  5. Step 5: Solve for x
    x = 5,125,402,328.02/81,422.38
  6. Step 6: Final answer
    x = 62,948.32

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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.