Home / 78,031.42-117,018.44-28,098.12

Finding the Fourth Proportional to 78,031.42, 117,018.44 and 28,098.12

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Solution

The fourth proportional to 78,031.42, 117,018.44 and 28,098.12 is: 42,136.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,031.42 : 117,018.44 = 28,098.12 : x
  2. Step 2: Convert to fraction form
    78,031.42/117,018.44 = 28,098.12/x
  3. Step 3: Cross multiply
    78,031.42x = 117,018.44 × 28,098.12
  4. Step 4: Simplify right side
    78,031.42x = 3,287,998,169.33
  5. Step 5: Solve for x
    x = 3,287,998,169.33/78,031.42
  6. Step 6: Final answer
    x = 42,136.85

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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.