Home / 260,969.16-391,515.03-81,045.39

Finding the Fourth Proportional to 260,969.16, 391,515.03 and 81,045.39

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Solution

The fourth proportional to 260,969.16, 391,515.03 and 81,045.39 is: 121,587.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,969.16 : 391,515.03 = 81,045.39 : x
  2. Step 2: Convert to fraction form
    260,969.16/391,515.03 = 81,045.39/x
  3. Step 3: Cross multiply
    260,969.16x = 391,515.03 × 81,045.39
  4. Step 4: Simplify right side
    260,969.16x = 31,730,488,297.21
  5. Step 5: Solve for x
    x = 31,730,488,297.21/260,969.16
  6. Step 6: Final answer
    x = 121,587.12

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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.