Home / 136,743.28-188,715.20-76,325.72

Finding the Fourth Proportional to 136,743.28, 188,715.20 and 76,325.72

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Solution

The fourth proportional to 136,743.28, 188,715.20 and 76,325.72 is: 105,334.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,743.28 : 188,715.20 = 76,325.72 : x
  2. Step 2: Convert to fraction form
    136,743.28/188,715.20 = 76,325.72/x
  3. Step 3: Cross multiply
    136,743.28x = 188,715.20 × 76,325.72
  4. Step 4: Simplify right side
    136,743.28x = 14,403,822,189.74
  5. Step 5: Solve for x
    x = 14,403,822,189.74/136,743.28
  6. Step 6: Final answer
    x = 105,334.77

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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.