Home / 83,661.65-115,453.22-45,421.20

Finding the Fourth Proportional to 83,661.65, 115,453.22 and 45,421.20

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Solution

The fourth proportional to 83,661.65, 115,453.22 and 45,421.20 is: 62,681.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,661.65 : 115,453.22 = 45,421.20 : x
  2. Step 2: Convert to fraction form
    83,661.65/115,453.22 = 45,421.20/x
  3. Step 3: Cross multiply
    83,661.65x = 115,453.22 × 45,421.20
  4. Step 4: Simplify right side
    83,661.65x = 5,244,023,569.16
  5. Step 5: Solve for x
    x = 5,244,023,569.16/83,661.65
  6. Step 6: Final answer
    x = 62,681.33

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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.