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Finding the Fourth Proportional to 43,603.20, 65,404.80 and 43,142.40

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Solution

The fourth proportional to 43,603.20, 65,404.80 and 43,142.40 is: 64,713.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,603.20 : 65,404.80 = 43,142.40 : x
  2. Step 2: Convert to fraction form
    43,603.20/65,404.80 = 43,142.40/x
  3. Step 3: Cross multiply
    43,603.20x = 65,404.80 × 43,142.40
  4. Step 4: Simplify right side
    43,603.20x = 2,821,720,043.52
  5. Step 5: Solve for x
    x = 2,821,720,043.52/43,603.20
  6. Step 6: Final answer
    x = 64,713.60

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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.