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Finding the Fourth Proportional to 139,715.93, 209,556.57 and 39,884.87

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Solution

The fourth proportional to 139,715.93, 209,556.57 and 39,884.87 is: 59,822.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,715.93 : 209,556.57 = 39,884.87 : x
  2. Step 2: Convert to fraction form
    139,715.93/209,556.57 = 39,884.87/x
  3. Step 3: Cross multiply
    139,715.93x = 209,556.57 × 39,884.87
  4. Step 4: Simplify right side
    139,715.93x = 8,358,136,552.10
  5. Step 5: Solve for x
    x = 8,358,136,552.10/139,715.93
  6. Step 6: Final answer
    x = 59,822.36

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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.