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Finding the Fourth Proportional to 121,107.47, 181,679.65 and 61,923.15

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Solution

The fourth proportional to 121,107.47, 181,679.65 and 61,923.15 is: 92,894.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,107.47 : 181,679.65 = 61,923.15 : x
  2. Step 2: Convert to fraction form
    121,107.47/181,679.65 = 61,923.15/x
  3. Step 3: Cross multiply
    121,107.47x = 181,679.65 × 61,923.15
  4. Step 4: Simplify right side
    121,107.47x = 11,250,176,064.09
  5. Step 5: Solve for x
    x = 11,250,176,064.09/121,107.47
  6. Step 6: Final answer
    x = 92,894.16

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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.