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Finding the Fourth Proportional to 158,358.98, 218,538.54 and 86,739.02

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Solution

The fourth proportional to 158,358.98, 218,538.54 and 86,739.02 is: 119,701.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,358.98 : 218,538.54 = 86,739.02 : x
  2. Step 2: Convert to fraction form
    158,358.98/218,538.54 = 86,739.02/x
  3. Step 3: Cross multiply
    158,358.98x = 218,538.54 × 86,739.02
  4. Step 4: Simplify right side
    158,358.98x = 18,955,818,791.83
  5. Step 5: Solve for x
    x = 18,955,818,791.83/158,358.98
  6. Step 6: Final answer
    x = 119,701.57

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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.