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Finding the Fourth Proportional to 77,672.61, 107,144.51 and 46,619.91

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Solution

The fourth proportional to 77,672.61, 107,144.51 and 46,619.91 is: 64,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,672.61 : 107,144.51 = 46,619.91 : x
  2. Step 2: Convert to fraction form
    77,672.61/107,144.51 = 46,619.91/x
  3. Step 3: Cross multiply
    77,672.61x = 107,144.51 × 46,619.91
  4. Step 4: Simplify right side
    77,672.61x = 4,995,067,180.09
  5. Step 5: Solve for x
    x = 4,995,067,180.09/77,672.61
  6. Step 6: Final answer
    x = 64,309.25

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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.