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Finding the Fourth Proportional to 75,011.67, 103,515.10 and 42,748.21

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Solution

The fourth proportional to 75,011.67, 103,515.10 and 42,748.21 is: 58,991.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,011.67 : 103,515.10 = 42,748.21 : x
  2. Step 2: Convert to fraction form
    75,011.67/103,515.10 = 42,748.21/x
  3. Step 3: Cross multiply
    75,011.67x = 103,515.10 × 42,748.21
  4. Step 4: Simplify right side
    75,011.67x = 4,425,085,232.97
  5. Step 5: Solve for x
    x = 4,425,085,232.97/75,011.67
  6. Step 6: Final answer
    x = 58,991.96

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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.