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Finding the Fourth Proportional to 139,021.65, 208,532.48 and 82,925.10

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Solution

The fourth proportional to 139,021.65, 208,532.48 and 82,925.10 is: 124,387.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,021.65 : 208,532.48 = 82,925.10 : x
  2. Step 2: Convert to fraction form
    139,021.65/208,532.48 = 82,925.10/x
  3. Step 3: Cross multiply
    139,021.65x = 208,532.48 × 82,925.10
  4. Step 4: Simplify right side
    139,021.65x = 17,292,576,342.62
  5. Step 5: Solve for x
    x = 17,292,576,342.62/139,021.65
  6. Step 6: Final answer
    x = 124,387.65

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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.