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Finding the Fourth Proportional to 178,685.46, 268,028.19 and 139,272.30

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Solution

The fourth proportional to 178,685.46, 268,028.19 and 139,272.30 is: 208,908.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,685.46 : 268,028.19 = 139,272.30 : x
  2. Step 2: Convert to fraction form
    178,685.46/268,028.19 = 139,272.30/x
  3. Step 3: Cross multiply
    178,685.46x = 268,028.19 × 139,272.30
  4. Step 4: Simplify right side
    178,685.46x = 37,328,902,486.14
  5. Step 5: Solve for x
    x = 37,328,902,486.14/178,685.46
  6. Step 6: Final answer
    x = 208,908.45

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1.5x scale

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.