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Finding the Fourth Proportional to 91,448.40, 137,086.20 and 54,037.20

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Solution

The fourth proportional to 91,448.40, 137,086.20 and 54,037.20 is: 81,004.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,448.40 : 137,086.20 = 54,037.20 : x
  2. Step 2: Convert to fraction form
    91,448.40/137,086.20 = 54,037.20/x
  3. Step 3: Cross multiply
    91,448.40x = 137,086.20 × 54,037.20
  4. Step 4: Simplify right side
    91,448.40x = 7,407,754,406.64
  5. Step 5: Solve for x
    x = 7,407,754,406.64/91,448.40
  6. Step 6: Final answer
    x = 81,004.75

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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.