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Finding the Fourth Proportional to 368,706.06, 553,060.84 and 128,818.95

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Solution

The fourth proportional to 368,706.06, 553,060.84 and 128,818.95 is: 193,229.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,706.06 : 553,060.84 = 128,818.95 : x
  2. Step 2: Convert to fraction form
    368,706.06/553,060.84 = 128,818.95/x
  3. Step 3: Cross multiply
    368,706.06x = 553,060.84 × 128,818.95
  4. Step 4: Simplify right side
    368,706.06x = 71,244,716,694.92
  5. Step 5: Solve for x
    x = 71,244,716,694.92/368,706.06
  6. Step 6: Final answer
    x = 193,229.04

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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.