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Finding the Fourth Proportional to 151,617.68, 209,215.67 and 87,943.17

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Solution

The fourth proportional to 151,617.68, 209,215.67 and 87,943.17 is: 121,351.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,617.68 : 209,215.67 = 87,943.17 : x
  2. Step 2: Convert to fraction form
    151,617.68/209,215.67 = 87,943.17/x
  3. Step 3: Cross multiply
    151,617.68x = 209,215.67 × 87,943.17
  4. Step 4: Simplify right side
    151,617.68x = 18,399,089,233.47
  5. Step 5: Solve for x
    x = 18,399,089,233.47/151,617.68
  6. Step 6: Final answer
    x = 121,351.87

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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.