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Finding the Fourth Proportional to 259,030.69, 388,567.90 and 72,042.19

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Solution

The fourth proportional to 259,030.69, 388,567.90 and 72,042.19 is: 108,069.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,030.69 : 388,567.90 = 72,042.19 : x
  2. Step 2: Convert to fraction form
    259,030.69/388,567.90 = 72,042.19/x
  3. Step 3: Cross multiply
    259,030.69x = 388,567.90 × 72,042.19
  4. Step 4: Simplify right side
    259,030.69x = 27,993,281,598.33
  5. Step 5: Solve for x
    x = 27,993,281,598.33/259,030.69
  6. Step 6: Final answer
    x = 108,069.36

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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.