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Finding the Fourth Proportional to 139,266.67, 208,977.62 and 75,223.52

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Solution

The fourth proportional to 139,266.67, 208,977.62 and 75,223.52 is: 112,877.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,266.67 : 208,977.62 = 75,223.52 : x
  2. Step 2: Convert to fraction form
    139,266.67/208,977.62 = 75,223.52/x
  3. Step 3: Cross multiply
    139,266.67x = 208,977.62 × 75,223.52
  4. Step 4: Simplify right side
    139,266.67x = 15,720,031,038.70
  5. Step 5: Solve for x
    x = 15,720,031,038.70/139,266.67
  6. Step 6: Final answer
    x = 112,877.20

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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.