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Finding the Fourth Proportional to 133,688.40, 200,467.80 and 74,461.20

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Solution

The fourth proportional to 133,688.40, 200,467.80 and 74,461.20 is: 111,655.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,688.40 : 200,467.80 = 74,461.20 : x
  2. Step 2: Convert to fraction form
    133,688.40/200,467.80 = 74,461.20/x
  3. Step 3: Cross multiply
    133,688.40x = 200,467.80 × 74,461.20
  4. Step 4: Simplify right side
    133,688.40x = 14,927,072,949.36
  5. Step 5: Solve for x
    x = 14,927,072,949.36/133,688.40
  6. Step 6: Final answer
    x = 111,655.71

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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.