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Finding the Fourth Proportional to 158,691.60, 218,987.08 and 87,069.84

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Solution

The fourth proportional to 158,691.60, 218,987.08 and 87,069.84 is: 120,152.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,691.60 : 218,987.08 = 87,069.84 : x
  2. Step 2: Convert to fraction form
    158,691.60/218,987.08 = 87,069.84/x
  3. Step 3: Cross multiply
    158,691.60x = 218,987.08 × 87,069.84
  4. Step 4: Simplify right side
    158,691.60x = 19,067,170,017.67
  5. Step 5: Solve for x
    x = 19,067,170,017.67/158,691.60
  6. Step 6: Final answer
    x = 120,152.36

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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.