Home / 258,731.47-388,069.90-69,210.96

Finding the Fourth Proportional to 258,731.47, 388,069.90 and 69,210.96

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Solution

The fourth proportional to 258,731.47, 388,069.90 and 69,210.96 is: 103,809.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,731.47 : 388,069.90 = 69,210.96 : x
  2. Step 2: Convert to fraction form
    258,731.47/388,069.90 = 69,210.96/x
  3. Step 3: Cross multiply
    258,731.47x = 388,069.90 × 69,210.96
  4. Step 4: Simplify right side
    258,731.47x = 26,858,690,326.10
  5. Step 5: Solve for x
    x = 26,858,690,326.10/258,731.47
  6. Step 6: Final answer
    x = 103,809.14

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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.