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Finding the Fourth Proportional to 158,906.80, 219,292.80 and 87,288.28

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Solution

The fourth proportional to 158,906.80, 219,292.80 and 87,288.28 is: 120,458.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,906.80 : 219,292.80 = 87,288.28 : x
  2. Step 2: Convert to fraction form
    158,906.80/219,292.80 = 87,288.28/x
  3. Step 3: Cross multiply
    158,906.80x = 219,292.80 × 87,288.28
  4. Step 4: Simplify right side
    158,906.80x = 19,141,691,328.38
  5. Step 5: Solve for x
    x = 19,141,691,328.38/158,906.80
  6. Step 6: Final answer
    x = 120,458.60

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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.