Home / 108,168.79-149,175.96-90,079.40

Finding the Fourth Proportional to 108,168.79, 149,175.96 and 90,079.40

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Solution

The fourth proportional to 108,168.79, 149,175.96 and 90,079.40 is: 124,228.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,168.79 : 149,175.96 = 90,079.40 : x
  2. Step 2: Convert to fraction form
    108,168.79/149,175.96 = 90,079.40/x
  3. Step 3: Cross multiply
    108,168.79x = 149,175.96 × 90,079.40
  4. Step 4: Simplify right side
    108,168.79x = 13,437,680,971.22
  5. Step 5: Solve for x
    x = 13,437,680,971.22/108,168.79
  6. Step 6: Final answer
    x = 124,228.82

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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.