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Finding the Fourth Proportional to 77,812.60, 107,379.98 and 43,820.96

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Solution

The fourth proportional to 77,812.60, 107,379.98 and 43,820.96 is: 60,472.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,812.60 : 107,379.98 = 43,820.96 : x
  2. Step 2: Convert to fraction form
    77,812.60/107,379.98 = 43,820.96/x
  3. Step 3: Cross multiply
    77,812.60x = 107,379.98 × 43,820.96
  4. Step 4: Simplify right side
    77,812.60x = 4,705,493,808.38
  5. Step 5: Solve for x
    x = 4,705,493,808.38/77,812.60
  6. Step 6: Final answer
    x = 60,472.13

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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.