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Finding the Fourth Proportional to 75,509.84, 104,687.90 and 71,310.80

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Solution

The fourth proportional to 75,509.84, 104,687.90 and 71,310.80 is: 98,866.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,509.84 : 104,687.90 = 71,310.80 : x
  2. Step 2: Convert to fraction form
    75,509.84/104,687.90 = 71,310.80/x
  3. Step 3: Cross multiply
    75,509.84x = 104,687.90 × 71,310.80
  4. Step 4: Simplify right side
    75,509.84x = 7,465,377,899.32
  5. Step 5: Solve for x
    x = 7,465,377,899.32/75,509.84
  6. Step 6: Final answer
    x = 98,866.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.