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Finding the Fourth Proportional to 218,145.16, 300,939.28 and 127,504.95

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Solution

The fourth proportional to 218,145.16, 300,939.28 and 127,504.95 is: 175,897.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,145.16 : 300,939.28 = 127,504.95 : x
  2. Step 2: Convert to fraction form
    218,145.16/300,939.28 = 127,504.95/x
  3. Step 3: Cross multiply
    218,145.16x = 300,939.28 × 127,504.95
  4. Step 4: Simplify right side
    218,145.16x = 38,371,247,119.37
  5. Step 5: Solve for x
    x = 38,371,247,119.37/218,145.16
  6. Step 6: Final answer
    x = 175,897.77

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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.