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Finding the Fourth Proportional to 402,175.20, 603,343.80 and 117,865.20

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Solution

The fourth proportional to 402,175.20, 603,343.80 and 117,865.20 is: 176,821.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,175.20 : 603,343.80 = 117,865.20 : x
  2. Step 2: Convert to fraction form
    402,175.20/603,343.80 = 117,865.20/x
  3. Step 3: Cross multiply
    402,175.20x = 603,343.80 × 117,865.20
  4. Step 4: Simplify right side
    402,175.20x = 71,113,237,655.76
  5. Step 5: Solve for x
    x = 71,113,237,655.76/402,175.20
  6. Step 6: Final answer
    x = 176,821.54

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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.