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Finding the Fourth Proportional to 103,344.90, 155,017.35 and 65,947.20

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Solution

The fourth proportional to 103,344.90, 155,017.35 and 65,947.20 is: 98,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,344.90 : 155,017.35 = 65,947.20 : x
  2. Step 2: Convert to fraction form
    103,344.90/155,017.35 = 65,947.20/x
  3. Step 3: Cross multiply
    103,344.90x = 155,017.35 × 65,947.20
  4. Step 4: Simplify right side
    103,344.90x = 10,222,960,183.92
  5. Step 5: Solve for x
    x = 10,222,960,183.92/103,344.90
  6. Step 6: Final answer
    x = 98,920.80

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1.5x scale

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.