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Finding the Fourth Proportional to 203,030.78, 280,179.08 and 112,384.80

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Solution

The fourth proportional to 203,030.78, 280,179.08 and 112,384.80 is: 155,089.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,030.78 : 280,179.08 = 112,384.80 : x
  2. Step 2: Convert to fraction form
    203,030.78/280,179.08 = 112,384.80/x
  3. Step 3: Cross multiply
    203,030.78x = 280,179.08 × 112,384.80
  4. Step 4: Simplify right side
    203,030.78x = 31,487,869,308.06
  5. Step 5: Solve for x
    x = 31,487,869,308.06/203,030.78
  6. Step 6: Final answer
    x = 155,089.14

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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.