Home / 127,728.32-176,270.55-71,139.70

Finding the Fourth Proportional to 127,728.32, 176,270.55 and 71,139.70

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Solution

The fourth proportional to 127,728.32, 176,270.55 and 71,139.70 is: 98,175.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,728.32 : 176,270.55 = 71,139.70 : x
  2. Step 2: Convert to fraction form
    127,728.32/176,270.55 = 71,139.70/x
  3. Step 3: Cross multiply
    127,728.32x = 176,270.55 × 71,139.70
  4. Step 4: Simplify right side
    127,728.32x = 12,539,834,045.84
  5. Step 5: Solve for x
    x = 12,539,834,045.84/127,728.32
  6. Step 6: Final answer
    x = 98,175.83

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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.