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Finding the Fourth Proportional to 158,425.40, 218,632.13 and 86,809.98

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Solution

The fourth proportional to 158,425.40, 218,632.13 and 86,809.98 is: 119,800.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,425.40 : 218,632.13 = 86,809.98 : x
  2. Step 2: Convert to fraction form
    158,425.40/218,632.13 = 86,809.98/x
  3. Step 3: Cross multiply
    158,425.40x = 218,632.13 × 86,809.98
  4. Step 4: Simplify right side
    158,425.40x = 18,979,450,832.66
  5. Step 5: Solve for x
    x = 18,979,450,832.66/158,425.40
  6. Step 6: Final answer
    x = 119,800.55

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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.