Home / 258,045.39-387,068.10-80,567.61

Finding the Fourth Proportional to 258,045.39, 387,068.10 and 80,567.61

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Solution

The fourth proportional to 258,045.39, 387,068.10 and 80,567.61 is: 120,851.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,045.39 : 387,068.10 = 80,567.61 : x
  2. Step 2: Convert to fraction form
    258,045.39/387,068.10 = 80,567.61/x
  3. Step 3: Cross multiply
    258,045.39x = 387,068.10 × 80,567.61
  4. Step 4: Simplify right side
    258,045.39x = 31,185,151,724.24
  5. Step 5: Solve for x
    x = 31,185,151,724.24/258,045.39
  6. Step 6: Final answer
    x = 120,851.42

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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.