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Finding the Fourth Proportional to 124,121.77, 171,323.20 and 73,164.06

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Solution

The fourth proportional to 124,121.77, 171,323.20 and 73,164.06 is: 100,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,121.77 : 171,323.20 = 73,164.06 : x
  2. Step 2: Convert to fraction form
    124,121.77/171,323.20 = 73,164.06/x
  3. Step 3: Cross multiply
    124,121.77x = 171,323.20 × 73,164.06
  4. Step 4: Simplify right side
    124,121.77x = 12,534,700,975.65
  5. Step 5: Solve for x
    x = 12,534,700,975.65/124,121.77
  6. Step 6: Final answer
    x = 100,987.13

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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.