Home / 84,115.49-126,136.32-31,488.07

Finding the Fourth Proportional to 84,115.49, 126,136.32 and 31,488.07

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Solution

The fourth proportional to 84,115.49, 126,136.32 and 31,488.07 is: 47,218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,115.49 : 126,136.32 = 31,488.07 : x
  2. Step 2: Convert to fraction form
    84,115.49/126,136.32 = 31,488.07/x
  3. Step 3: Cross multiply
    84,115.49x = 126,136.32 × 31,488.07
  4. Step 4: Simplify right side
    84,115.49x = 3,971,788,899.15
  5. Step 5: Solve for x
    x = 3,971,788,899.15/84,115.49
  6. Step 6: Final answer
    x = 47,218.28

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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.