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Finding the Fourth Proportional to 99,664.34, 149,327.34 and 60,138.40

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Solution

The fourth proportional to 99,664.34, 149,327.34 and 60,138.40 is: 90,105.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,664.34 : 149,327.34 = 60,138.40 : x
  2. Step 2: Convert to fraction form
    99,664.34/149,327.34 = 60,138.40/x
  3. Step 3: Cross multiply
    99,664.34x = 149,327.34 × 60,138.40
  4. Step 4: Simplify right side
    99,664.34x = 8,980,307,303.86
  5. Step 5: Solve for x
    x = 8,980,307,303.86/99,664.34
  6. Step 6: Final answer
    x = 90,105.52

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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.