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Finding the Fourth Proportional to 60,138.69, 90,239.16 and 43,634.94

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Solution

The fourth proportional to 60,138.69, 90,239.16 and 43,634.94 is: 65,474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,138.69 : 90,239.16 = 43,634.94 : x
  2. Step 2: Convert to fraction form
    60,138.69/90,239.16 = 43,634.94/x
  3. Step 3: Cross multiply
    60,138.69x = 90,239.16 × 43,634.94
  4. Step 4: Simplify right side
    60,138.69x = 3,937,580,332.25
  5. Step 5: Solve for x
    x = 3,937,580,332.25/60,138.69
  6. Step 6: Final answer
    x = 65,474.99

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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.