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Finding the Fourth Proportional to 77,603.66, 116,346.47 and 40,139.87

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Solution

The fourth proportional to 77,603.66, 116,346.47 and 40,139.87 is: 60,179.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,603.66 : 116,346.47 = 40,139.87 : x
  2. Step 2: Convert to fraction form
    77,603.66/116,346.47 = 40,139.87/x
  3. Step 3: Cross multiply
    77,603.66x = 116,346.47 × 40,139.87
  4. Step 4: Simplify right side
    77,603.66x = 4,670,131,398.33
  5. Step 5: Solve for x
    x = 4,670,131,398.33/77,603.66
  6. Step 6: Final answer
    x = 60,179.27

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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.