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Finding the Fourth Proportional to 77,018.49, 115,543.94 and 43,753.95

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Solution

The fourth proportional to 77,018.49, 115,543.94 and 43,753.95 is: 65,640.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,018.49 : 115,543.94 = 43,753.95 : x
  2. Step 2: Convert to fraction form
    77,018.49/115,543.94 = 43,753.95/x
  3. Step 3: Cross multiply
    77,018.49x = 115,543.94 × 43,753.95
  4. Step 4: Simplify right side
    77,018.49x = 5,055,503,773.56
  5. Step 5: Solve for x
    x = 5,055,503,773.56/77,018.49
  6. Step 6: Final answer
    x = 65,640.13

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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.