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Finding the Fourth Proportional to 121,851.70, 182,777.55 and 86,422.30

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Solution

The fourth proportional to 121,851.70, 182,777.55 and 86,422.30 is: 129,633.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,851.70 : 182,777.55 = 86,422.30 : x
  2. Step 2: Convert to fraction form
    121,851.70/182,777.55 = 86,422.30/x
  3. Step 3: Cross multiply
    121,851.70x = 182,777.55 × 86,422.30
  4. Step 4: Simplify right side
    121,851.70x = 15,796,056,259.37
  5. Step 5: Solve for x
    x = 15,796,056,259.37/121,851.70
  6. Step 6: Final answer
    x = 129,633.45

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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.