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Finding the Fourth Proportional to 169,811.80, 254,717.70 and 91,079.80

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Solution

The fourth proportional to 169,811.80, 254,717.70 and 91,079.80 is: 136,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,811.80 : 254,717.70 = 91,079.80 : x
  2. Step 2: Convert to fraction form
    169,811.80/254,717.70 = 91,079.80/x
  3. Step 3: Cross multiply
    169,811.80x = 254,717.70 × 91,079.80
  4. Step 4: Simplify right side
    169,811.80x = 23,199,637,172.46
  5. Step 5: Solve for x
    x = 23,199,637,172.46/169,811.80
  6. Step 6: Final answer
    x = 136,619.70

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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.