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Finding the Fourth Proportional to 108,781.88, 150,121.32 and 61,038.68

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Solution

The fourth proportional to 108,781.88, 150,121.32 and 61,038.68 is: 84,234.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,781.88 : 150,121.32 = 61,038.68 : x
  2. Step 2: Convert to fraction form
    108,781.88/150,121.32 = 61,038.68/x
  3. Step 3: Cross multiply
    108,781.88x = 150,121.32 × 61,038.68
  4. Step 4: Simplify right side
    108,781.88x = 9,163,207,212.66
  5. Step 5: Solve for x
    x = 9,163,207,212.66/108,781.88
  6. Step 6: Final answer
    x = 84,234.68

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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.