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Finding the Fourth Proportional to 91,984.80, 137,977.20 and 68,365.20

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Solution

The fourth proportional to 91,984.80, 137,977.20 and 68,365.20 is: 102,547.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,984.80 : 137,977.20 = 68,365.20 : x
  2. Step 2: Convert to fraction form
    91,984.80/137,977.20 = 68,365.20/x
  3. Step 3: Cross multiply
    91,984.80x = 137,977.20 × 68,365.20
  4. Step 4: Simplify right side
    91,984.80x = 9,432,838,873.44
  5. Step 5: Solve for x
    x = 9,432,838,873.44/91,984.80
  6. Step 6: Final answer
    x = 102,547.80

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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.