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Finding the Fourth Proportional to 77,809.85, 107,376.18 and 43,818.20

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Solution

The fourth proportional to 77,809.85, 107,376.18 and 43,818.20 is: 60,468.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,809.85 : 107,376.18 = 43,818.20 : x
  2. Step 2: Convert to fraction form
    77,809.85/107,376.18 = 43,818.20/x
  3. Step 3: Cross multiply
    77,809.85x = 107,376.18 × 43,818.20
  4. Step 4: Simplify right side
    77,809.85x = 4,705,030,930.48
  5. Step 5: Solve for x
    x = 4,705,030,930.48/77,809.85
  6. Step 6: Final answer
    x = 60,468.32

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1.5x scale

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.