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Finding the Fourth Proportional to 158,708.66, 219,017.35 and 87,089.88

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Solution

The fourth proportional to 158,708.66, 219,017.35 and 87,089.88 is: 120,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,708.66 : 219,017.35 = 87,089.88 : x
  2. Step 2: Convert to fraction form
    158,708.66/219,017.35 = 87,089.88/x
  3. Step 3: Cross multiply
    158,708.66x = 219,017.35 × 87,089.88
  4. Step 4: Simplify right side
    158,708.66x = 19,074,194,729.42
  5. Step 5: Solve for x
    x = 19,074,194,729.42/158,708.66
  6. Step 6: Final answer
    x = 120,183.70

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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.