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Finding the Fourth Proportional to 72,636.84, 100,221.21 and 42,404.85

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Solution

The fourth proportional to 72,636.84, 100,221.21 and 42,404.85 is: 58,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,636.84 : 100,221.21 = 42,404.85 : x
  2. Step 2: Convert to fraction form
    72,636.84/100,221.21 = 42,404.85/x
  3. Step 3: Cross multiply
    72,636.84x = 100,221.21 × 42,404.85
  4. Step 4: Simplify right side
    72,636.84x = 4,249,865,376.87
  5. Step 5: Solve for x
    x = 4,249,865,376.87/72,636.84
  6. Step 6: Final answer
    x = 58,508.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.