Home / 131,281.60-196,663.20-78,534.40

Finding the Fourth Proportional to 131,281.60, 196,663.20 and 78,534.40

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Solution

The fourth proportional to 131,281.60, 196,663.20 and 78,534.40 is: 117,646.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,281.60 : 196,663.20 = 78,534.40 : x
  2. Step 2: Convert to fraction form
    131,281.60/196,663.20 = 78,534.40/x
  3. Step 3: Cross multiply
    131,281.60x = 196,663.20 × 78,534.40
  4. Step 4: Simplify right side
    131,281.60x = 15,444,826,414.08
  5. Step 5: Solve for x
    x = 15,444,826,414.08/131,281.60
  6. Step 6: Final answer
    x = 117,646.54

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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.