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Finding the Fourth Proportional to 43,612.60, 65,418.90 and 38,428.60

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Solution

The fourth proportional to 43,612.60, 65,418.90 and 38,428.60 is: 57,642.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,612.60 : 65,418.90 = 38,428.60 : x
  2. Step 2: Convert to fraction form
    43,612.60/65,418.90 = 38,428.60/x
  3. Step 3: Cross multiply
    43,612.60x = 65,418.90 × 38,428.60
  4. Step 4: Simplify right side
    43,612.60x = 2,513,956,740.54
  5. Step 5: Solve for x
    x = 2,513,956,740.54/43,612.60
  6. Step 6: Final answer
    x = 57,642.90

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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.