Home / 258,716.72-388,139.67-90,239.46

Finding the Fourth Proportional to 258,716.72, 388,139.67 and 90,239.46

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Solution

The fourth proportional to 258,716.72, 388,139.67 and 90,239.46 is: 135,381.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,716.72 : 388,139.67 = 90,239.46 : x
  2. Step 2: Convert to fraction form
    258,716.72/388,139.67 = 90,239.46/x
  3. Step 3: Cross multiply
    258,716.72x = 388,139.67 × 90,239.46
  4. Step 4: Simplify right side
    258,716.72x = 35,025,514,225.38
  5. Step 5: Solve for x
    x = 35,025,514,225.38/258,716.72
  6. Step 6: Final answer
    x = 135,381.72

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1.5x scale

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.