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Finding the Fourth Proportional to 108,168.66, 149,175.78 and 90,079.28

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Solution

The fourth proportional to 108,168.66, 149,175.78 and 90,079.28 is: 124,228.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,168.66 : 149,175.78 = 90,079.28 : x
  2. Step 2: Convert to fraction form
    108,168.66/149,175.78 = 90,079.28/x
  3. Step 3: Cross multiply
    108,168.66x = 149,175.78 × 90,079.28
  4. Step 4: Simplify right side
    108,168.66x = 13,437,647,228.78
  5. Step 5: Solve for x
    x = 13,437,647,228.78/108,168.66
  6. Step 6: Final answer
    x = 124,228.66

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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.