Home / 131,505.12-197,322.48-81,572.40

Finding the Fourth Proportional to 131,505.12, 197,322.48 and 81,572.40

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Solution

The fourth proportional to 131,505.12, 197,322.48 and 81,572.40 is: 122,398.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,505.12 : 197,322.48 = 81,572.40 : x
  2. Step 2: Convert to fraction form
    131,505.12/197,322.48 = 81,572.40/x
  3. Step 3: Cross multiply
    131,505.12x = 197,322.48 × 81,572.40
  4. Step 4: Simplify right side
    131,505.12x = 16,096,068,267.55
  5. Step 5: Solve for x
    x = 16,096,068,267.55/131,505.12
  6. Step 6: Final answer
    x = 122,398.80

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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.