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Finding the Fourth Proportional to 77,979.80, 107,607.12 and 44,443.64

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Solution

The fourth proportional to 77,979.80, 107,607.12 and 44,443.64 is: 61,329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,979.80 : 107,607.12 = 44,443.64 : x
  2. Step 2: Convert to fraction form
    77,979.80/107,607.12 = 44,443.64/x
  3. Step 3: Cross multiply
    77,979.80x = 107,607.12 × 44,443.64
  4. Step 4: Simplify right side
    77,979.80x = 4,782,452,205.07
  5. Step 5: Solve for x
    x = 4,782,452,205.07/77,979.80
  6. Step 6: Final answer
    x = 61,329.37

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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.