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Finding the Fourth Proportional to 158,894.12, 219,279.48 and 87,280.76

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Solution

The fourth proportional to 158,894.12, 219,279.48 and 87,280.76 is: 120,450.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,894.12 : 219,279.48 = 87,280.76 : x
  2. Step 2: Convert to fraction form
    158,894.12/219,279.48 = 87,280.76/x
  3. Step 3: Cross multiply
    158,894.12x = 219,279.48 × 87,280.76
  4. Step 4: Simplify right side
    158,894.12x = 19,138,879,666.80
  5. Step 5: Solve for x
    x = 19,138,879,666.80/158,894.12
  6. Step 6: Final answer
    x = 120,450.52

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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.