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Finding the Fourth Proportional to 220,233.60, 303,917.26 and 128,347.03

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Solution

The fourth proportional to 220,233.60, 303,917.26 and 128,347.03 is: 177,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,233.60 : 303,917.26 = 128,347.03 : x
  2. Step 2: Convert to fraction form
    220,233.60/303,917.26 = 128,347.03/x
  3. Step 3: Cross multiply
    220,233.60x = 303,917.26 × 128,347.03
  4. Step 4: Simplify right side
    220,233.60x = 39,006,877,686.74
  5. Step 5: Solve for x
    x = 39,006,877,686.74/220,233.60
  6. Step 6: Final answer
    x = 177,115.92

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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.