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Finding the Fourth Proportional to 368,143.72, 552,216.36 and 101,905

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Solution

The fourth proportional to 368,143.72, 552,216.36 and 101,905 is: 152,857.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,143.72 : 552,216.36 = 101,905 : x
  2. Step 2: Convert to fraction form
    368,143.72/552,216.36 = 101,905/x
  3. Step 3: Cross multiply
    368,143.72x = 552,216.36 × 101,905
  4. Step 4: Simplify right side
    368,143.72x = 56,273,608,165.80
  5. Step 5: Solve for x
    x = 56,273,608,165.80/368,143.72
  6. Step 6: Final answer
    x = 152,857.72

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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.