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Finding the Fourth Proportional to 77,609.54, 107,171.10 and 48,979.89

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Solution

The fourth proportional to 77,609.54, 107,171.10 and 48,979.89 is: 67,636.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,609.54 : 107,171.10 = 48,979.89 : x
  2. Step 2: Convert to fraction form
    77,609.54/107,171.10 = 48,979.89/x
  3. Step 3: Cross multiply
    77,609.54x = 107,171.10 × 48,979.89
  4. Step 4: Simplify right side
    77,609.54x = 5,249,228,689.18
  5. Step 5: Solve for x
    x = 5,249,228,689.18/77,609.54
  6. Step 6: Final answer
    x = 67,636.38

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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.