Home / 78,019.08-117,031.86-25,429.02

Finding the Fourth Proportional to 78,019.08, 117,031.86 and 25,429.02

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Solution

The fourth proportional to 78,019.08, 117,031.86 and 25,429.02 is: 38,144.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,019.08 : 117,031.86 = 25,429.02 : x
  2. Step 2: Convert to fraction form
    78,019.08/117,031.86 = 25,429.02/x
  3. Step 3: Cross multiply
    78,019.08x = 117,031.86 × 25,429.02
  4. Step 4: Simplify right side
    78,019.08x = 2,976,005,508.58
  5. Step 5: Solve for x
    x = 2,976,005,508.58/78,019.08
  6. Step 6: Final answer
    x = 38,144.59

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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.