Home / 128,619.90-192,937.14-39,886.02

Finding the Fourth Proportional to 128,619.90, 192,937.14 and 39,886.02

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Solution

The fourth proportional to 128,619.90, 192,937.14 and 39,886.02 is: 59,831.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,619.90 : 192,937.14 = 39,886.02 : x
  2. Step 2: Convert to fraction form
    128,619.90/192,937.14 = 39,886.02/x
  3. Step 3: Cross multiply
    128,619.90x = 192,937.14 × 39,886.02
  4. Step 4: Simplify right side
    128,619.90x = 7,695,494,624.78
  5. Step 5: Solve for x
    x = 7,695,494,624.78/128,619.90
  6. Step 6: Final answer
    x = 59,831.29

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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.