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Finding the Fourth Proportional to 158,842.35, 219,188.16 and 87,220.80

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Solution

The fourth proportional to 158,842.35, 219,188.16 and 87,220.80 is: 120,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,842.35 : 219,188.16 = 87,220.80 : x
  2. Step 2: Convert to fraction form
    158,842.35/219,188.16 = 87,220.80/x
  3. Step 3: Cross multiply
    158,842.35x = 219,188.16 × 87,220.80
  4. Step 4: Simplify right side
    158,842.35x = 19,117,766,665.73
  5. Step 5: Solve for x
    x = 19,117,766,665.73/158,842.35
  6. Step 6: Final answer
    x = 120,356.86

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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.