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Finding the Fourth Proportional to 158,373.15, 218,555 and 86,754.34

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Solution

The fourth proportional to 158,373.15, 218,555 and 86,754.34 is: 119,721.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,373.15 : 218,555 = 86,754.34 : x
  2. Step 2: Convert to fraction form
    158,373.15/218,555 = 86,754.34/x
  3. Step 3: Cross multiply
    158,373.15x = 218,555 × 86,754.34
  4. Step 4: Simplify right side
    158,373.15x = 18,960,594,778.70
  5. Step 5: Solve for x
    x = 18,960,594,778.70/158,373.15
  6. Step 6: Final answer
    x = 119,721.02

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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.