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Finding the Fourth Proportional to 158,808.45, 219,152.94 and 87,187.95

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Solution

The fourth proportional to 158,808.45, 219,152.94 and 87,187.95 is: 120,317.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,808.45 : 219,152.94 = 87,187.95 : x
  2. Step 2: Convert to fraction form
    158,808.45/219,152.94 = 87,187.95/x
  3. Step 3: Cross multiply
    158,808.45x = 219,152.94 × 87,187.95
  4. Step 4: Simplify right side
    158,808.45x = 19,107,495,575.07
  5. Step 5: Solve for x
    x = 19,107,495,575.07/158,808.45
  6. Step 6: Final answer
    x = 120,317.88

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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.