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Finding the Fourth Proportional to 81,360.80, 112,264.52 and 51,124.69

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Solution

The fourth proportional to 81,360.80, 112,264.52 and 51,124.69 is: 70,543.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,360.80 : 112,264.52 = 51,124.69 : x
  2. Step 2: Convert to fraction form
    81,360.80/112,264.52 = 51,124.69/x
  3. Step 3: Cross multiply
    81,360.80x = 112,264.52 × 51,124.69
  4. Step 4: Simplify right side
    81,360.80x = 5,739,489,199.13
  5. Step 5: Solve for x
    x = 5,739,489,199.13/81,360.80
  6. Step 6: Final answer
    x = 70,543.66

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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.