Home / 138,728.32-208,087.62-38,887.72

Finding the Fourth Proportional to 138,728.32, 208,087.62 and 38,887.72

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Solution

The fourth proportional to 138,728.32, 208,087.62 and 38,887.72 is: 58,330.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,728.32 : 208,087.62 = 38,887.72 : x
  2. Step 2: Convert to fraction form
    138,728.32/208,087.62 = 38,887.72/x
  3. Step 3: Cross multiply
    138,728.32x = 208,087.62 × 38,887.72
  4. Step 4: Simplify right side
    138,728.32x = 8,092,053,102.03
  5. Step 5: Solve for x
    x = 8,092,053,102.03/138,728.32
  6. Step 6: Final answer
    x = 58,330.22

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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.