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Finding the Fourth Proportional to 139,742.38, 209,646.06 and 39,903.94

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Solution

The fourth proportional to 139,742.38, 209,646.06 and 39,903.94 is: 59,865.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,742.38 : 209,646.06 = 39,903.94 : x
  2. Step 2: Convert to fraction form
    139,742.38/209,646.06 = 39,903.94/x
  3. Step 3: Cross multiply
    139,742.38x = 209,646.06 × 39,903.94
  4. Step 4: Simplify right side
    139,742.38x = 8,365,703,799.48
  5. Step 5: Solve for x
    x = 8,365,703,799.48/139,742.38
  6. Step 6: Final answer
    x = 59,865.19

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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.