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Finding the Fourth Proportional to 218,726.22, 301,841.19 and 121,928.79

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Solution

The fourth proportional to 218,726.22, 301,841.19 and 121,928.79 is: 168,261.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,726.22 : 301,841.19 = 121,928.79 : x
  2. Step 2: Convert to fraction form
    218,726.22/301,841.19 = 121,928.79/x
  3. Step 3: Cross multiply
    218,726.22x = 301,841.19 × 121,928.79
  4. Step 4: Simplify right side
    218,726.22x = 36,803,131,068.86
  5. Step 5: Solve for x
    x = 36,803,131,068.86/218,726.22
  6. Step 6: Final answer
    x = 168,261.18

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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.