Home / 97,731.40-146,424.30-86,672.20

Finding the Fourth Proportional to 97,731.40, 146,424.30 and 86,672.20

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Solution

The fourth proportional to 97,731.40, 146,424.30 and 86,672.20 is: 129,855.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,731.40 : 146,424.30 = 86,672.20 : x
  2. Step 2: Convert to fraction form
    97,731.40/146,424.30 = 86,672.20/x
  3. Step 3: Cross multiply
    97,731.40x = 146,424.30 × 86,672.20
  4. Step 4: Simplify right side
    97,731.40x = 12,690,916,214.46
  5. Step 5: Solve for x
    x = 12,690,916,214.46/97,731.40
  6. Step 6: Final answer
    x = 129,855.05

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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.