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Finding the Fourth Proportional to 139,713.14, 209,569.78 and 46,218.89

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Solution

The fourth proportional to 139,713.14, 209,569.78 and 46,218.89 is: 69,328.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,713.14 : 209,569.78 = 46,218.89 : x
  2. Step 2: Convert to fraction form
    139,713.14/209,569.78 = 46,218.89/x
  3. Step 3: Cross multiply
    139,713.14x = 209,569.78 × 46,218.89
  4. Step 4: Simplify right side
    139,713.14x = 9,686,082,609.14
  5. Step 5: Solve for x
    x = 9,686,082,609.14/139,713.14
  6. Step 6: Final answer
    x = 69,328.36

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1.5x scale

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.