Home / 55,329.66-76,354.11-31,128.78

Finding the Fourth Proportional to 55,329.66, 76,354.11 and 31,128.78

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Solution

The fourth proportional to 55,329.66, 76,354.11 and 31,128.78 is: 42,957.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,329.66 : 76,354.11 = 31,128.78 : x
  2. Step 2: Convert to fraction form
    55,329.66/76,354.11 = 31,128.78/x
  3. Step 3: Cross multiply
    55,329.66x = 76,354.11 × 31,128.78
  4. Step 4: Simplify right side
    55,329.66x = 2,376,810,292.29
  5. Step 5: Solve for x
    x = 2,376,810,292.29/55,329.66
  6. Step 6: Final answer
    x = 42,957.25

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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.