Home / 134,989.22-186,287.09-78,400.59

Finding the Fourth Proportional to 134,989.22, 186,287.09 and 78,400.59

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Solution

The fourth proportional to 134,989.22, 186,287.09 and 78,400.59 is: 108,193.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,989.22 : 186,287.09 = 78,400.59 : x
  2. Step 2: Convert to fraction form
    134,989.22/186,287.09 = 78,400.59/x
  3. Step 3: Cross multiply
    134,989.22x = 186,287.09 × 78,400.59
  4. Step 4: Simplify right side
    134,989.22x = 14,605,017,373.38
  5. Step 5: Solve for x
    x = 14,605,017,373.38/134,989.22
  6. Step 6: Final answer
    x = 108,193.96

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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.