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Finding the Fourth Proportional to 255,274.91, 382,674.51 and 86,679.93

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Solution

The fourth proportional to 255,274.91, 382,674.51 and 86,679.93 is: 129,939.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,274.91 : 382,674.51 = 86,679.93 : x
  2. Step 2: Convert to fraction form
    255,274.91/382,674.51 = 86,679.93/x
  3. Step 3: Cross multiply
    255,274.91x = 382,674.51 × 86,679.93
  4. Step 4: Simplify right side
    255,274.91x = 33,170,199,306.18
  5. Step 5: Solve for x
    x = 33,170,199,306.18/255,274.91
  6. Step 6: Final answer
    x = 129,939.13

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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.