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Finding the Fourth Proportional to 121,309.70, 167,437.18 and 78,337.13

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Solution

The fourth proportional to 121,309.70, 167,437.18 and 78,337.13 is: 108,124.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,309.70 : 167,437.18 = 78,337.13 : x
  2. Step 2: Convert to fraction form
    121,309.70/167,437.18 = 78,337.13/x
  3. Step 3: Cross multiply
    121,309.70x = 167,437.18 × 78,337.13
  4. Step 4: Simplify right side
    121,309.70x = 13,116,546,956.58
  5. Step 5: Solve for x
    x = 13,116,546,956.58/121,309.70
  6. Step 6: Final answer
    x = 108,124.47

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1.5x scale

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.