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Finding the Fourth Proportional to 43,409.80, 65,114.70 and 40,785.40

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Solution

The fourth proportional to 43,409.80, 65,114.70 and 40,785.40 is: 61,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,409.80 : 65,114.70 = 40,785.40 : x
  2. Step 2: Convert to fraction form
    43,409.80/65,114.70 = 40,785.40/x
  3. Step 3: Cross multiply
    43,409.80x = 65,114.70 × 40,785.40
  4. Step 4: Simplify right side
    43,409.80x = 2,655,729,085.38
  5. Step 5: Solve for x
    x = 2,655,729,085.38/43,409.80
  6. Step 6: Final answer
    x = 61,178.10

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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.