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Finding the Fourth Proportional to 104,047.66, 143,442.78 and 65,788.06

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Solution

The fourth proportional to 104,047.66, 143,442.78 and 65,788.06 is: 90,697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,047.66 : 143,442.78 = 65,788.06 : x
  2. Step 2: Convert to fraction form
    104,047.66/143,442.78 = 65,788.06/x
  3. Step 3: Cross multiply
    104,047.66x = 143,442.78 × 65,788.06
  4. Step 4: Simplify right side
    104,047.66x = 9,436,822,217.21
  5. Step 5: Solve for x
    x = 9,436,822,217.21/104,047.66
  6. Step 6: Final answer
    x = 90,697.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.