Home / 142,362.50-196,443.20-78,691.64

Finding the Fourth Proportional to 142,362.50, 196,443.20 and 78,691.64

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Solution

The fourth proportional to 142,362.50, 196,443.20 and 78,691.64 is: 108,585.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,362.50 : 196,443.20 = 78,691.64 : x
  2. Step 2: Convert to fraction form
    142,362.50/196,443.20 = 78,691.64/x
  3. Step 3: Cross multiply
    142,362.50x = 196,443.20 × 78,691.64
  4. Step 4: Simplify right side
    142,362.50x = 15,458,437,181.39
  5. Step 5: Solve for x
    x = 15,458,437,181.39/142,362.50
  6. Step 6: Final answer
    x = 108,585.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.