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Finding the Fourth Proportional to 75,649.80, 104,299.16 and 61,987.05

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Solution

The fourth proportional to 75,649.80, 104,299.16 and 61,987.05 is: 85,462.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,649.80 : 104,299.16 = 61,987.05 : x
  2. Step 2: Convert to fraction form
    75,649.80/104,299.16 = 61,987.05/x
  3. Step 3: Cross multiply
    75,649.80x = 104,299.16 × 61,987.05
  4. Step 4: Simplify right side
    75,649.80x = 6,465,197,400.85
  5. Step 5: Solve for x
    x = 6,465,197,400.85/75,649.80
  6. Step 6: Final answer
    x = 85,462.19

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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.