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Finding the Fourth Proportional to 75,392.61, 112,958.15 and 45,748.16

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Solution

The fourth proportional to 75,392.61, 112,958.15 and 45,748.16 is: 68,542.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,392.61 : 112,958.15 = 45,748.16 : x
  2. Step 2: Convert to fraction form
    75,392.61/112,958.15 = 45,748.16/x
  3. Step 3: Cross multiply
    75,392.61x = 112,958.15 × 45,748.16
  4. Step 4: Simplify right side
    75,392.61x = 5,167,627,149.57
  5. Step 5: Solve for x
    x = 5,167,627,149.57/75,392.61
  6. Step 6: Final answer
    x = 68,542.89

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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.