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Finding the Fourth Proportional to 108,750.56, 149,989.20 and 89,854.88

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Solution

The fourth proportional to 108,750.56, 149,989.20 and 89,854.88 is: 123,928.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,750.56 : 149,989.20 = 89,854.88 : x
  2. Step 2: Convert to fraction form
    108,750.56/149,989.20 = 89,854.88/x
  3. Step 3: Cross multiply
    108,750.56x = 149,989.20 × 89,854.88
  4. Step 4: Simplify right side
    108,750.56x = 13,477,261,567.30
  5. Step 5: Solve for x
    x = 13,477,261,567.30/108,750.56
  6. Step 6: Final answer
    x = 123,928.20

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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.