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Finding the Fourth Proportional to 77,712.50, 107,243.03 and 43,720.98

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Solution

The fourth proportional to 77,712.50, 107,243.03 and 43,720.98 is: 60,334.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,712.50 : 107,243.03 = 43,720.98 : x
  2. Step 2: Convert to fraction form
    77,712.50/107,243.03 = 43,720.98/x
  3. Step 3: Cross multiply
    77,712.50x = 107,243.03 × 43,720.98
  4. Step 4: Simplify right side
    77,712.50x = 4,688,770,151.16
  5. Step 5: Solve for x
    x = 4,688,770,151.16/77,712.50
  6. Step 6: Final answer
    x = 60,334.83

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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.