Home / 66,979.72-100,470.30-25,417

Finding the Fourth Proportional to 66,979.72, 100,470.30 and 25,417

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Solution

The fourth proportional to 66,979.72, 100,470.30 and 25,417 is: 38,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,979.72 : 100,470.30 = 25,417 : x
  2. Step 2: Convert to fraction form
    66,979.72/100,470.30 = 25,417/x
  3. Step 3: Cross multiply
    66,979.72x = 100,470.30 × 25,417
  4. Step 4: Simplify right side
    66,979.72x = 2,553,653,615.10
  5. Step 5: Solve for x
    x = 2,553,653,615.10/66,979.72
  6. Step 6: Final answer
    x = 38,125.77

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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.