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Finding the Fourth Proportional to 159,294.08, 219,824.14 and 87,672.57

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Solution

The fourth proportional to 159,294.08, 219,824.14 and 87,672.57 is: 120,987.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,294.08 : 219,824.14 = 87,672.57 : x
  2. Step 2: Convert to fraction form
    159,294.08/219,824.14 = 87,672.57/x
  3. Step 3: Cross multiply
    159,294.08x = 219,824.14 × 87,672.57
  4. Step 4: Simplify right side
    159,294.08x = 19,272,547,301.84
  5. Step 5: Solve for x
    x = 19,272,547,301.84/159,294.08
  6. Step 6: Final answer
    x = 120,987.22

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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.