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Finding the Fourth Proportional to 43,812.60, 65,718.90 and 30,449.40

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Solution

The fourth proportional to 43,812.60, 65,718.90 and 30,449.40 is: 45,674.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,812.60 : 65,718.90 = 30,449.40 : x
  2. Step 2: Convert to fraction form
    43,812.60/65,718.90 = 30,449.40/x
  3. Step 3: Cross multiply
    43,812.60x = 65,718.90 × 30,449.40
  4. Step 4: Simplify right side
    43,812.60x = 2,001,101,073.66
  5. Step 5: Solve for x
    x = 2,001,101,073.66/43,812.60
  6. Step 6: Final answer
    x = 45,674.10

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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.