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Finding the Fourth Proportional to 100,035.90, 138,068.01 and 64,270.62

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Solution

The fourth proportional to 100,035.90, 138,068.01 and 64,270.62 is: 88,705.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,035.90 : 138,068.01 = 64,270.62 : x
  2. Step 2: Convert to fraction form
    100,035.90/138,068.01 = 64,270.62/x
  3. Step 3: Cross multiply
    100,035.90x = 138,068.01 × 64,270.62
  4. Step 4: Simplify right side
    100,035.90x = 8,873,716,604.87
  5. Step 5: Solve for x
    x = 8,873,716,604.87/100,035.90
  6. Step 6: Final answer
    x = 88,705.32

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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.