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Finding the Fourth Proportional to 77,705.46, 107,223.45 and 43,712.80

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Solution

The fourth proportional to 77,705.46, 107,223.45 and 43,712.80 is: 60,317.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,705.46 : 107,223.45 = 43,712.80 : x
  2. Step 2: Convert to fraction form
    77,705.46/107,223.45 = 43,712.80/x
  3. Step 3: Cross multiply
    77,705.46x = 107,223.45 × 43,712.80
  4. Step 4: Simplify right side
    77,705.46x = 4,687,036,793.18
  5. Step 5: Solve for x
    x = 4,687,036,793.18/77,705.46
  6. Step 6: Final answer
    x = 60,317.99

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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.