Home / 77,211.20-115,989.60-74,062.40

Finding the Fourth Proportional to 77,211.20, 115,989.60 and 74,062.40

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Solution

The fourth proportional to 77,211.20, 115,989.60 and 74,062.40 is: 111,259.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,211.20 : 115,989.60 = 74,062.40 : x
  2. Step 2: Convert to fraction form
    77,211.20/115,989.60 = 74,062.40/x
  3. Step 3: Cross multiply
    77,211.20x = 115,989.60 × 74,062.40
  4. Step 4: Simplify right side
    77,211.20x = 8,590,468,151.04
  5. Step 5: Solve for x
    x = 8,590,468,151.04/77,211.20
  6. Step 6: Final answer
    x = 111,259.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.