Home / 134,989.20-186,296.40-78,397.20

Finding the Fourth Proportional to 134,989.20, 186,296.40 and 78,397.20

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Solution

The fourth proportional to 134,989.20, 186,296.40 and 78,397.20 is: 108,194.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,989.20 : 186,296.40 = 78,397.20 : x
  2. Step 2: Convert to fraction form
    134,989.20/186,296.40 = 78,397.20/x
  3. Step 3: Cross multiply
    134,989.20x = 186,296.40 × 78,397.20
  4. Step 4: Simplify right side
    134,989.20x = 14,605,116,130.08
  5. Step 5: Solve for x
    x = 14,605,116,130.08/134,989.20
  6. Step 6: Final answer
    x = 108,194.70

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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.