Home / 136,223.07-187,984.89-78,864.84

Finding the Fourth Proportional to 136,223.07, 187,984.89 and 78,864.84

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Solution

The fourth proportional to 136,223.07, 187,984.89 and 78,864.84 is: 108,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,223.07 : 187,984.89 = 78,864.84 : x
  2. Step 2: Convert to fraction form
    136,223.07/187,984.89 = 78,864.84/x
  3. Step 3: Cross multiply
    136,223.07x = 187,984.89 × 78,864.84
  4. Step 4: Simplify right side
    136,223.07x = 14,825,398,272.27
  5. Step 5: Solve for x
    x = 14,825,398,272.27/136,223.07
  6. Step 6: Final answer
    x = 108,831.77

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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.