Home / 131,421.40-197,132.10-72,226.60

Finding the Fourth Proportional to 131,421.40, 197,132.10 and 72,226.60

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Solution

The fourth proportional to 131,421.40, 197,132.10 and 72,226.60 is: 108,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,421.40 : 197,132.10 = 72,226.60 : x
  2. Step 2: Convert to fraction form
    131,421.40/197,132.10 = 72,226.60/x
  3. Step 3: Cross multiply
    131,421.40x = 197,132.10 × 72,226.60
  4. Step 4: Simplify right side
    131,421.40x = 14,238,181,333.86
  5. Step 5: Solve for x
    x = 14,238,181,333.86/131,421.40
  6. Step 6: Final answer
    x = 108,339.90

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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.