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Finding the Fourth Proportional to 158,693.60, 218,989.84 and 87,071.84

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Solution

The fourth proportional to 158,693.60, 218,989.84 and 87,071.84 is: 120,155.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,693.60 : 218,989.84 = 87,071.84 : x
  2. Step 2: Convert to fraction form
    158,693.60/218,989.84 = 87,071.84/x
  3. Step 3: Cross multiply
    158,693.60x = 218,989.84 × 87,071.84
  4. Step 4: Simplify right side
    158,693.60x = 19,067,848,310.11
  5. Step 5: Solve for x
    x = 19,067,848,310.11/158,693.60
  6. Step 6: Final answer
    x = 120,155.12

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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.