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Finding the Fourth Proportional to 121,165.80, 181,967.40 and 87,923.40

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Solution

The fourth proportional to 121,165.80, 181,967.40 and 87,923.40 is: 132,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,165.80 : 181,967.40 = 87,923.40 : x
  2. Step 2: Convert to fraction form
    121,165.80/181,967.40 = 87,923.40/x
  3. Step 3: Cross multiply
    121,165.80x = 181,967.40 × 87,923.40
  4. Step 4: Simplify right side
    121,165.80x = 15,999,192,497.16
  5. Step 5: Solve for x
    x = 15,999,192,497.16/121,165.80
  6. Step 6: Final answer
    x = 132,043.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.