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Finding the Fourth Proportional to 108,458.40, 162,428.40 and 87,722.40

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Solution

The fourth proportional to 108,458.40, 162,428.40 and 87,722.40 is: 131,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,458.40 : 162,428.40 = 87,722.40 : x
  2. Step 2: Convert to fraction form
    108,458.40/162,428.40 = 87,722.40/x
  3. Step 3: Cross multiply
    108,458.40x = 162,428.40 × 87,722.40
  4. Step 4: Simplify right side
    108,458.40x = 14,248,609,076.16
  5. Step 5: Solve for x
    x = 14,248,609,076.16/108,458.40
  6. Step 6: Final answer
    x = 131,373.96

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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.