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Finding the Fourth Proportional to 53,817.70, 80,726.55 and 42,140.90

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Solution

The fourth proportional to 53,817.70, 80,726.55 and 42,140.90 is: 63,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,817.70 : 80,726.55 = 42,140.90 : x
  2. Step 2: Convert to fraction form
    53,817.70/80,726.55 = 42,140.90/x
  3. Step 3: Cross multiply
    53,817.70x = 80,726.55 × 42,140.90
  4. Step 4: Simplify right side
    53,817.70x = 3,401,889,470.90
  5. Step 5: Solve for x
    x = 3,401,889,470.90/53,817.70
  6. Step 6: Final answer
    x = 63,211.35

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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.