Home / 136,979.40-205,469.10-89,740.20

Finding the Fourth Proportional to 136,979.40, 205,469.10 and 89,740.20

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Solution

The fourth proportional to 136,979.40, 205,469.10 and 89,740.20 is: 134,610.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,979.40 : 205,469.10 = 89,740.20 : x
  2. Step 2: Convert to fraction form
    136,979.40/205,469.10 = 89,740.20/x
  3. Step 3: Cross multiply
    136,979.40x = 205,469.10 × 89,740.20
  4. Step 4: Simplify right side
    136,979.40x = 18,438,838,127.82
  5. Step 5: Solve for x
    x = 18,438,838,127.82/136,979.40
  6. Step 6: Final answer
    x = 134,610.30

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1.5x scale

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.