Home / 99,980.91-137,988.66-57,531.24

Finding the Fourth Proportional to 99,980.91, 137,988.66 and 57,531.24

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Solution

The fourth proportional to 99,980.91, 137,988.66 and 57,531.24 is: 79,401.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,980.91 : 137,988.66 = 57,531.24 : x
  2. Step 2: Convert to fraction form
    99,980.91/137,988.66 = 57,531.24/x
  3. Step 3: Cross multiply
    99,980.91x = 137,988.66 × 57,531.24
  4. Step 4: Simplify right side
    99,980.91x = 7,938,658,715.74
  5. Step 5: Solve for x
    x = 7,938,658,715.74/99,980.91
  6. Step 6: Final answer
    x = 79,401.74

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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.