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Finding the Fourth Proportional to 108,515.52, 162,775.44 and 71,312.76

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Solution

The fourth proportional to 108,515.52, 162,775.44 and 71,312.76 is: 106,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,515.52 : 162,775.44 = 71,312.76 : x
  2. Step 2: Convert to fraction form
    108,515.52/162,775.44 = 71,312.76/x
  3. Step 3: Cross multiply
    108,515.52x = 162,775.44 × 71,312.76
  4. Step 4: Simplify right side
    108,515.52x = 11,607,965,886.61
  5. Step 5: Solve for x
    x = 11,607,965,886.61/108,515.52
  6. Step 6: Final answer
    x = 106,970.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.