Home / 151,349.72-208,887-87,724.22

Finding the Fourth Proportional to 151,349.72, 208,887 and 87,724.22

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Solution

The fourth proportional to 151,349.72, 208,887 and 87,724.22 is: 121,073.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,349.72 : 208,887 = 87,724.22 : x
  2. Step 2: Convert to fraction form
    151,349.72/208,887 = 87,724.22/x
  3. Step 3: Cross multiply
    151,349.72x = 208,887 × 87,724.22
  4. Step 4: Simplify right side
    151,349.72x = 18,324,449,143.14
  5. Step 5: Solve for x
    x = 18,324,449,143.14/151,349.72
  6. Step 6: Final answer
    x = 121,073.56

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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.