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Finding the Fourth Proportional to 259,108.68, 388,335.57 and 138,866.82

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Solution

The fourth proportional to 259,108.68, 388,335.57 and 138,866.82 is: 208,124.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,108.68 : 388,335.57 = 138,866.82 : x
  2. Step 2: Convert to fraction form
    259,108.68/388,335.57 = 138,866.82/x
  3. Step 3: Cross multiply
    259,108.68x = 388,335.57 × 138,866.82
  4. Step 4: Simplify right side
    259,108.68x = 53,926,925,698.79
  5. Step 5: Solve for x
    x = 53,926,925,698.79/259,108.68
  6. Step 6: Final answer
    x = 208,124.74

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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.