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Finding the Fourth Proportional to 147,135.60, 220,794.60 and 77,065.20

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Solution

The fourth proportional to 147,135.60, 220,794.60 and 77,065.20 is: 115,645.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,135.60 : 220,794.60 = 77,065.20 : x
  2. Step 2: Convert to fraction form
    147,135.60/220,794.60 = 77,065.20/x
  3. Step 3: Cross multiply
    147,135.60x = 220,794.60 × 77,065.20
  4. Step 4: Simplify right side
    147,135.60x = 17,015,580,007.92
  5. Step 5: Solve for x
    x = 17,015,580,007.92/147,135.60
  6. Step 6: Final answer
    x = 115,645.57

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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.