Home / 220,080.50-303,712.35-129,440.28

Finding the Fourth Proportional to 220,080.50, 303,712.35 and 129,440.28

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Solution

The fourth proportional to 220,080.50, 303,712.35 and 129,440.28 is: 178,628.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,080.50 : 303,712.35 = 129,440.28 : x
  2. Step 2: Convert to fraction form
    220,080.50/303,712.35 = 129,440.28/x
  3. Step 3: Cross multiply
    220,080.50x = 303,712.35 × 129,440.28
  4. Step 4: Simplify right side
    220,080.50x = 39,312,611,623.46
  5. Step 5: Solve for x
    x = 39,312,611,623.46/220,080.50
  6. Step 6: Final answer
    x = 178,628.33

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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.