Home / 136,018.80-187,632-86,868.72

Finding the Fourth Proportional to 136,018.80, 187,632 and 86,868.72

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Solution

The fourth proportional to 136,018.80, 187,632 and 86,868.72 is: 119,831.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,018.80 : 187,632 = 86,868.72 : x
  2. Step 2: Convert to fraction form
    136,018.80/187,632 = 86,868.72/x
  3. Step 3: Cross multiply
    136,018.80x = 187,632 × 86,868.72
  4. Step 4: Simplify right side
    136,018.80x = 16,299,351,671.04
  5. Step 5: Solve for x
    x = 16,299,351,671.04/136,018.80
  6. Step 6: Final answer
    x = 119,831.61

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1.5x scale

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.