Home / 77,638.25-107,144.64-47,418.68

Finding the Fourth Proportional to 77,638.25, 107,144.64 and 47,418.68

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Solution

The fourth proportional to 77,638.25, 107,144.64 and 47,418.68 is: 65,440.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,638.25 : 107,144.64 = 47,418.68 : x
  2. Step 2: Convert to fraction form
    77,638.25/107,144.64 = 47,418.68/x
  3. Step 3: Cross multiply
    77,638.25x = 107,144.64 × 47,418.68
  4. Step 4: Simplify right side
    77,638.25x = 5,080,657,665.74
  5. Step 5: Solve for x
    x = 5,080,657,665.74/77,638.25
  6. Step 6: Final answer
    x = 65,440.13

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1.5x scale

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.