Home / 137,128.32-205,718.40-43,660.80

Finding the Fourth Proportional to 137,128.32, 205,718.40 and 43,660.80

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Solution

The fourth proportional to 137,128.32, 205,718.40 and 43,660.80 is: 65,499.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,128.32 : 205,718.40 = 43,660.80 : x
  2. Step 2: Convert to fraction form
    137,128.32/205,718.40 = 43,660.80/x
  3. Step 3: Cross multiply
    137,128.32x = 205,718.40 × 43,660.80
  4. Step 4: Simplify right side
    137,128.32x = 8,981,829,918.72
  5. Step 5: Solve for x
    x = 8,981,829,918.72/137,128.32
  6. Step 6: Final answer
    x = 65,499.45

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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.