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Finding the Fourth Proportional to 91,798.80, 137,687.52 and 28,623.60

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Solution

The fourth proportional to 91,798.80, 137,687.52 and 28,623.60 is: 42,932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,798.80 : 137,687.52 = 28,623.60 : x
  2. Step 2: Convert to fraction form
    91,798.80/137,687.52 = 28,623.60/x
  3. Step 3: Cross multiply
    91,798.80x = 137,687.52 × 28,623.60
  4. Step 4: Simplify right side
    91,798.80x = 3,941,112,497.47
  5. Step 5: Solve for x
    x = 3,941,112,497.47/91,798.80
  6. Step 6: Final answer
    x = 42,932.07

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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.