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Finding the Fourth Proportional to 158,987.88, 219,398.85 and 87,367.95

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Solution

The fourth proportional to 158,987.88, 219,398.85 and 87,367.95 is: 120,565.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,987.88 : 219,398.85 = 87,367.95 : x
  2. Step 2: Convert to fraction form
    158,987.88/219,398.85 = 87,367.95/x
  3. Step 3: Cross multiply
    158,987.88x = 219,398.85 × 87,367.95
  4. Step 4: Simplify right side
    158,987.88x = 19,168,427,756.86
  5. Step 5: Solve for x
    x = 19,168,427,756.86/158,987.88
  6. Step 6: Final answer
    x = 120,565.34

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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.