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Finding the Fourth Proportional to 85,309.80, 127,964.69 and 45,812.58

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Solution

The fourth proportional to 85,309.80, 127,964.69 and 45,812.58 is: 68,718.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,309.80 : 127,964.69 = 45,812.58 : x
  2. Step 2: Convert to fraction form
    85,309.80/127,964.69 = 45,812.58/x
  3. Step 3: Cross multiply
    85,309.80x = 127,964.69 × 45,812.58
  4. Step 4: Simplify right side
    85,309.80x = 5,862,392,368.74
  5. Step 5: Solve for x
    x = 5,862,392,368.74/85,309.80
  6. Step 6: Final answer
    x = 68,718.86

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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.