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Finding the Fourth Proportional to 74,404.80, 111,607.20 and 68,702.40

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Solution

The fourth proportional to 74,404.80, 111,607.20 and 68,702.40 is: 103,053.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,404.80 : 111,607.20 = 68,702.40 : x
  2. Step 2: Convert to fraction form
    74,404.80/111,607.20 = 68,702.40/x
  3. Step 3: Cross multiply
    74,404.80x = 111,607.20 × 68,702.40
  4. Step 4: Simplify right side
    74,404.80x = 7,667,682,497.28
  5. Step 5: Solve for x
    x = 7,667,682,497.28/74,404.80
  6. Step 6: Final answer
    x = 103,053.60

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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.