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Finding the Fourth Proportional to 207,859.92, 286,655.40 and 136,213.80

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Solution

The fourth proportional to 207,859.92, 286,655.40 and 136,213.80 is: 187,849.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,859.92 : 286,655.40 = 136,213.80 : x
  2. Step 2: Convert to fraction form
    207,859.92/286,655.40 = 136,213.80/x
  3. Step 3: Cross multiply
    207,859.92x = 286,655.40 × 136,213.80
  4. Step 4: Simplify right side
    207,859.92x = 39,046,421,324.52
  5. Step 5: Solve for x
    x = 39,046,421,324.52/207,859.92
  6. Step 6: Final answer
    x = 187,849.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.