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Finding the Fourth Proportional to 43,339.80, 65,009.70 and 40,715.40

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Solution

The fourth proportional to 43,339.80, 65,009.70 and 40,715.40 is: 61,073.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,339.80 : 65,009.70 = 40,715.40 : x
  2. Step 2: Convert to fraction form
    43,339.80/65,009.70 = 40,715.40/x
  3. Step 3: Cross multiply
    43,339.80x = 65,009.70 × 40,715.40
  4. Step 4: Simplify right side
    43,339.80x = 2,646,895,939.38
  5. Step 5: Solve for x
    x = 2,646,895,939.38/43,339.80
  6. Step 6: Final answer
    x = 61,073.10

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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.