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Finding the Fourth Proportional to 147,113.60, 220,761.60 and 77,043.20

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Solution

The fourth proportional to 147,113.60, 220,761.60 and 77,043.20 is: 115,612.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,113.60 : 220,761.60 = 77,043.20 : x
  2. Step 2: Convert to fraction form
    147,113.60/220,761.60 = 77,043.20/x
  3. Step 3: Cross multiply
    147,113.60x = 220,761.60 × 77,043.20
  4. Step 4: Simplify right side
    147,113.60x = 17,008,180,101.12
  5. Step 5: Solve for x
    x = 17,008,180,101.12/147,113.60
  6. Step 6: Final answer
    x = 115,612.56

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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.