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Finding the Fourth Proportional to 151,642.52, 209,199.01 and 87,943.40

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Solution

The fourth proportional to 151,642.52, 209,199.01 and 87,943.40 is: 121,322.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,642.52 : 209,199.01 = 87,943.40 : x
  2. Step 2: Convert to fraction form
    151,642.52/209,199.01 = 87,943.40/x
  3. Step 3: Cross multiply
    151,642.52x = 209,199.01 × 87,943.40
  4. Step 4: Simplify right side
    151,642.52x = 18,397,672,216.03
  5. Step 5: Solve for x
    x = 18,397,672,216.03/151,642.52
  6. Step 6: Final answer
    x = 121,322.65

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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.