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Finding the Fourth Proportional to 121,159.94, 181,726.94 and 42,275.66

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Solution

The fourth proportional to 121,159.94, 181,726.94 and 42,275.66 is: 63,408.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,159.94 : 181,726.94 = 42,275.66 : x
  2. Step 2: Convert to fraction form
    121,159.94/181,726.94 = 42,275.66/x
  3. Step 3: Cross multiply
    121,159.94x = 181,726.94 × 42,275.66
  4. Step 4: Simplify right side
    121,159.94x = 7,682,625,525.33
  5. Step 5: Solve for x
    x = 7,682,625,525.33/121,159.94
  6. Step 6: Final answer
    x = 63,408.96

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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.