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Finding the Fourth Proportional to 91,292.80, 136,851.72 and 38,629.84

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Solution

The fourth proportional to 91,292.80, 136,851.72 and 38,629.84 is: 57,907.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,292.80 : 136,851.72 = 38,629.84 : x
  2. Step 2: Convert to fraction form
    91,292.80/136,851.72 = 38,629.84/x
  3. Step 3: Cross multiply
    91,292.80x = 136,851.72 × 38,629.84
  4. Step 4: Simplify right side
    91,292.80x = 5,286,560,047.32
  5. Step 5: Solve for x
    x = 5,286,560,047.32/91,292.80
  6. Step 6: Final answer
    x = 57,907.74

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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.