Home / 77,122.20-115,856.10-73,973.40

Finding the Fourth Proportional to 77,122.20, 115,856.10 and 73,973.40

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Solution

The fourth proportional to 77,122.20, 115,856.10 and 73,973.40 is: 111,125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,122.20 : 115,856.10 = 73,973.40 : x
  2. Step 2: Convert to fraction form
    77,122.20/115,856.10 = 73,973.40/x
  3. Step 3: Cross multiply
    77,122.20x = 115,856.10 × 73,973.40
  4. Step 4: Simplify right side
    77,122.20x = 8,570,269,627.74
  5. Step 5: Solve for x
    x = 8,570,269,627.74/77,122.20
  6. Step 6: Final answer
    x = 111,125.84

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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.