Home / 102,658.20-153,987.30-71,165.40

Finding the Fourth Proportional to 102,658.20, 153,987.30 and 71,165.40

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Solution

The fourth proportional to 102,658.20, 153,987.30 and 71,165.40 is: 106,748.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,658.20 : 153,987.30 = 71,165.40 : x
  2. Step 2: Convert to fraction form
    102,658.20/153,987.30 = 71,165.40/x
  3. Step 3: Cross multiply
    102,658.20x = 153,987.30 × 71,165.40
  4. Step 4: Simplify right side
    102,658.20x = 10,958,567,799.42
  5. Step 5: Solve for x
    x = 10,958,567,799.42/102,658.20
  6. Step 6: Final answer
    x = 106,748.10

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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.