Home / 80,979.78-121,547.52-39,455.94

Finding the Fourth Proportional to 80,979.78, 121,547.52 and 39,455.94

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Solution

The fourth proportional to 80,979.78, 121,547.52 and 39,455.94 is: 59,221.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,979.78 : 121,547.52 = 39,455.94 : x
  2. Step 2: Convert to fraction form
    80,979.78/121,547.52 = 39,455.94/x
  3. Step 3: Cross multiply
    80,979.78x = 121,547.52 × 39,455.94
  4. Step 4: Simplify right side
    80,979.78x = 4,795,771,656.27
  5. Step 5: Solve for x
    x = 4,795,771,656.27/80,979.78
  6. Step 6: Final answer
    x = 59,221.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.