Home / 134,967.76-186,255.51-78,382.78

Finding the Fourth Proportional to 134,967.76, 186,255.51 and 78,382.78

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Solution

The fourth proportional to 134,967.76, 186,255.51 and 78,382.78 is: 108,168.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,967.76 : 186,255.51 = 78,382.78 : x
  2. Step 2: Convert to fraction form
    134,967.76/186,255.51 = 78,382.78/x
  3. Step 3: Cross multiply
    134,967.76x = 186,255.51 × 78,382.78
  4. Step 4: Simplify right side
    134,967.76x = 14,599,224,272.20
  5. Step 5: Solve for x
    x = 14,599,224,272.20/134,967.76
  6. Step 6: Final answer
    x = 108,168.23

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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.