Home / 136,552.50-188,440.56-76,128.12

Finding the Fourth Proportional to 136,552.50, 188,440.56 and 76,128.12

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Solution

The fourth proportional to 136,552.50, 188,440.56 and 76,128.12 is: 105,055.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,552.50 : 188,440.56 = 76,128.12 : x
  2. Step 2: Convert to fraction form
    136,552.50/188,440.56 = 76,128.12/x
  3. Step 3: Cross multiply
    136,552.50x = 188,440.56 × 76,128.12
  4. Step 4: Simplify right side
    136,552.50x = 14,345,625,564.55
  5. Step 5: Solve for x
    x = 14,345,625,564.55/136,552.50
  6. Step 6: Final answer
    x = 105,055.75

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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.