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Finding the Fourth Proportional to 108,960.21, 150,379.13 and 61,213.61

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Solution

The fourth proportional to 108,960.21, 150,379.13 and 61,213.61 is: 84,482.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,960.21 : 150,379.13 = 61,213.61 : x
  2. Step 2: Convert to fraction form
    108,960.21/150,379.13 = 61,213.61/x
  3. Step 3: Cross multiply
    108,960.21x = 150,379.13 × 61,213.61
  4. Step 4: Simplify right side
    108,960.21x = 9,205,249,944.94
  5. Step 5: Solve for x
    x = 9,205,249,944.94/108,960.21
  6. Step 6: Final answer
    x = 84,482.67

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1.5x scale

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.