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Finding the Fourth Proportional to 162,931.40, 244,324.20 and 74,139.20

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Solution

The fourth proportional to 162,931.40, 244,324.20 and 74,139.20 is: 111,175.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,931.40 : 244,324.20 = 74,139.20 : x
  2. Step 2: Convert to fraction form
    162,931.40/244,324.20 = 74,139.20/x
  3. Step 3: Cross multiply
    162,931.40x = 244,324.20 × 74,139.20
  4. Step 4: Simplify right side
    162,931.40x = 18,114,000,728.64
  5. Step 5: Solve for x
    x = 18,114,000,728.64/162,931.40
  6. Step 6: Final answer
    x = 111,175.63

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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.