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Finding the Fourth Proportional to 258,555.80, 387,833.70 and 71,567.30

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Solution

The fourth proportional to 258,555.80, 387,833.70 and 71,567.30 is: 107,350.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,555.80 : 387,833.70 = 71,567.30 : x
  2. Step 2: Convert to fraction form
    258,555.80/387,833.70 = 71,567.30/x
  3. Step 3: Cross multiply
    258,555.80x = 387,833.70 × 71,567.30
  4. Step 4: Simplify right side
    258,555.80x = 27,756,210,758.01
  5. Step 5: Solve for x
    x = 27,756,210,758.01/258,555.80
  6. Step 6: Final answer
    x = 107,350.95

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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.