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Finding the Fourth Proportional to 155,860.56, 215,083.25 and 87,876.93

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Solution

The fourth proportional to 155,860.56, 215,083.25 and 87,876.93 is: 121,267.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,860.56 : 215,083.25 = 87,876.93 : x
  2. Step 2: Convert to fraction form
    155,860.56/215,083.25 = 87,876.93/x
  3. Step 3: Cross multiply
    155,860.56x = 215,083.25 × 87,876.93
  4. Step 4: Simplify right side
    155,860.56x = 18,900,855,265.04
  5. Step 5: Solve for x
    x = 18,900,855,265.04/155,860.56
  6. Step 6: Final answer
    x = 121,267.72

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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.