Home / 76,979.88-106,226.17-42,985.71

Finding the Fourth Proportional to 76,979.88, 106,226.17 and 42,985.71

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Solution

The fourth proportional to 76,979.88, 106,226.17 and 42,985.71 is: 59,316.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,979.88 : 106,226.17 = 42,985.71 : x
  2. Step 2: Convert to fraction form
    76,979.88/106,226.17 = 42,985.71/x
  3. Step 3: Cross multiply
    76,979.88x = 106,226.17 × 42,985.71
  4. Step 4: Simplify right side
    76,979.88x = 4,566,207,072.47
  5. Step 5: Solve for x
    x = 4,566,207,072.47/76,979.88
  6. Step 6: Final answer
    x = 59,316.89

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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.