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Finding the Fourth Proportional to 53,642.60, 80,522.76 and 42,620.12

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Solution

The fourth proportional to 53,642.60, 80,522.76 and 42,620.12 is: 63,976.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,642.60 : 80,522.76 = 42,620.12 : x
  2. Step 2: Convert to fraction form
    53,642.60/80,522.76 = 42,620.12/x
  3. Step 3: Cross multiply
    53,642.60x = 80,522.76 × 42,620.12
  4. Step 4: Simplify right side
    53,642.60x = 3,431,889,693.93
  5. Step 5: Solve for x
    x = 3,431,889,693.93/53,642.60
  6. Step 6: Final answer
    x = 63,976.95

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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.