Home / 77,835.07-107,420.49-47,640.52

Finding the Fourth Proportional to 77,835.07, 107,420.49 and 47,640.52

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Solution

The fourth proportional to 77,835.07, 107,420.49 and 47,640.52 is: 65,748.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,835.07 : 107,420.49 = 47,640.52 : x
  2. Step 2: Convert to fraction form
    77,835.07/107,420.49 = 47,640.52/x
  3. Step 3: Cross multiply
    77,835.07x = 107,420.49 × 47,640.52
  4. Step 4: Simplify right side
    77,835.07x = 5,117,568,002.25
  5. Step 5: Solve for x
    x = 5,117,568,002.25/77,835.07
  6. Step 6: Final answer
    x = 65,748.87

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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.