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Finding the Fourth Proportional to 253,135.40, 379,592.39 and 120,053.72

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Solution

The fourth proportional to 253,135.40, 379,592.39 and 120,053.72 is: 180,028.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,135.40 : 379,592.39 = 120,053.72 : x
  2. Step 2: Convert to fraction form
    253,135.40/379,592.39 = 120,053.72/x
  3. Step 3: Cross multiply
    253,135.40x = 379,592.39 × 120,053.72
  4. Step 4: Simplify right side
    253,135.40x = 45,571,478,503.19
  5. Step 5: Solve for x
    x = 45,571,478,503.19/253,135.40
  6. Step 6: Final answer
    x = 180,028.07

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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.