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Finding the Fourth Proportional to 77,653.92, 107,155 and 45,396.09

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Solution

The fourth proportional to 77,653.92, 107,155 and 45,396.09 is: 62,642.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,653.92 : 107,155 = 45,396.09 : x
  2. Step 2: Convert to fraction form
    77,653.92/107,155 = 45,396.09/x
  3. Step 3: Cross multiply
    77,653.92x = 107,155 × 45,396.09
  4. Step 4: Simplify right side
    77,653.92x = 4,864,418,023.95
  5. Step 5: Solve for x
    x = 4,864,418,023.95/77,653.92
  6. Step 6: Final answer
    x = 62,642.27

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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.