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Finding the Fourth Proportional to 121,729.80, 182,901.90 and 77,377.80

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Solution

The fourth proportional to 121,729.80, 182,901.90 and 77,377.80 is: 116,261.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,729.80 : 182,901.90 = 77,377.80 : x
  2. Step 2: Convert to fraction form
    121,729.80/182,901.90 = 77,377.80/x
  3. Step 3: Cross multiply
    121,729.80x = 182,901.90 × 77,377.80
  4. Step 4: Simplify right side
    121,729.80x = 14,152,546,637.82
  5. Step 5: Solve for x
    x = 14,152,546,637.82/121,729.80
  6. Step 6: Final answer
    x = 116,261.97

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1.5x scale

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.