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Finding the Fourth Proportional to 158,879.60, 219,257.68 and 87,261.20

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Solution

The fourth proportional to 158,879.60, 219,257.68 and 87,261.20 is: 120,422.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,879.60 : 219,257.68 = 87,261.20 : x
  2. Step 2: Convert to fraction form
    158,879.60/219,257.68 = 87,261.20/x
  3. Step 3: Cross multiply
    158,879.60x = 219,257.68 × 87,261.20
  4. Step 4: Simplify right side
    158,879.60x = 19,132,688,266.02
  5. Step 5: Solve for x
    x = 19,132,688,266.02/158,879.60
  6. Step 6: Final answer
    x = 120,422.56

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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.