Home / 77,835.09-107,420.51-47,640.51

Finding the Fourth Proportional to 77,835.09, 107,420.51 and 47,640.51

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Solution

The fourth proportional to 77,835.09, 107,420.51 and 47,640.51 is: 65,748.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,835.09 : 107,420.51 = 47,640.51 : x
  2. Step 2: Convert to fraction form
    77,835.09/107,420.51 = 47,640.51/x
  3. Step 3: Cross multiply
    77,835.09x = 107,420.51 × 47,640.51
  4. Step 4: Simplify right side
    77,835.09x = 5,117,567,880.86
  5. Step 5: Solve for x
    x = 5,117,567,880.86/77,835.09
  6. Step 6: Final answer
    x = 65,748.85

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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.