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Finding the Fourth Proportional to 158,894.75, 219,278.20 and 87,278.70

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Solution

The fourth proportional to 158,894.75, 219,278.20 and 87,278.70 is: 120,446.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,894.75 : 219,278.20 = 87,278.70 : x
  2. Step 2: Convert to fraction form
    158,894.75/219,278.20 = 87,278.70/x
  3. Step 3: Cross multiply
    158,894.75x = 219,278.20 × 87,278.70
  4. Step 4: Simplify right side
    158,894.75x = 19,138,316,234.34
  5. Step 5: Solve for x
    x = 19,138,316,234.34/158,894.75
  6. Step 6: Final answer
    x = 120,446.50

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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.