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Finding the Fourth Proportional to 68,986.90, 103,480.35 and 62,425.90

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Solution

The fourth proportional to 68,986.90, 103,480.35 and 62,425.90 is: 93,638.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,986.90 : 103,480.35 = 62,425.90 : x
  2. Step 2: Convert to fraction form
    68,986.90/103,480.35 = 62,425.90/x
  3. Step 3: Cross multiply
    68,986.90x = 103,480.35 × 62,425.90
  4. Step 4: Simplify right side
    68,986.90x = 6,459,853,981.07
  5. Step 5: Solve for x
    x = 6,459,853,981.07/68,986.90
  6. Step 6: Final answer
    x = 93,638.85

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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.