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Finding the Fourth Proportional to 158,344.65, 218,506.91 and 86,710.77

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Solution

The fourth proportional to 158,344.65, 218,506.91 and 86,710.77 is: 119,656.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,344.65 : 218,506.91 = 86,710.77 : x
  2. Step 2: Convert to fraction form
    158,344.65/218,506.91 = 86,710.77/x
  3. Step 3: Cross multiply
    158,344.65x = 218,506.91 × 86,710.77
  4. Step 4: Simplify right side
    158,344.65x = 18,946,901,982.87
  5. Step 5: Solve for x
    x = 18,946,901,982.87/158,344.65
  6. Step 6: Final answer
    x = 119,656.09

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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.