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Finding the Fourth Proportional to 169,239.48, 253,859.22 and 86,191.80

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Solution

The fourth proportional to 169,239.48, 253,859.22 and 86,191.80 is: 129,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,239.48 : 253,859.22 = 86,191.80 : x
  2. Step 2: Convert to fraction form
    169,239.48/253,859.22 = 86,191.80/x
  3. Step 3: Cross multiply
    169,239.48x = 253,859.22 × 86,191.80
  4. Step 4: Simplify right side
    169,239.48x = 21,880,583,118.40
  5. Step 5: Solve for x
    x = 21,880,583,118.40/169,239.48
  6. Step 6: Final answer
    x = 129,287.70

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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.