Home / 99,990.69-138,021.90-57,566.13

Finding the Fourth Proportional to 99,990.69, 138,021.90 and 57,566.13

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Solution

The fourth proportional to 99,990.69, 138,021.90 and 57,566.13 is: 79,461.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,990.69 : 138,021.90 = 57,566.13 : x
  2. Step 2: Convert to fraction form
    99,990.69/138,021.90 = 57,566.13/x
  3. Step 3: Cross multiply
    99,990.69x = 138,021.90 × 57,566.13
  4. Step 4: Simplify right side
    99,990.69x = 7,945,386,638.25
  5. Step 5: Solve for x
    x = 7,945,386,638.25/99,990.69
  6. Step 6: Final answer
    x = 79,461.26

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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.