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Finding the Fourth Proportional to 266,159.79, 399,249 and 86,240.97

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Solution

The fourth proportional to 266,159.79, 399,249 and 86,240.97 is: 129,364.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,159.79 : 399,249 = 86,240.97 : x
  2. Step 2: Convert to fraction form
    266,159.79/399,249 = 86,240.97/x
  3. Step 3: Cross multiply
    266,159.79x = 399,249 × 86,240.97
  4. Step 4: Simplify right side
    266,159.79x = 34,431,621,031.53
  5. Step 5: Solve for x
    x = 34,431,621,031.53/266,159.79
  6. Step 6: Final answer
    x = 129,364.47

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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.