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Finding the Fourth Proportional to 125,082.88, 172,580.16 and 80,396.80

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Solution

The fourth proportional to 125,082.88, 172,580.16 and 80,396.80 is: 110,925.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,082.88 : 172,580.16 = 80,396.80 : x
  2. Step 2: Convert to fraction form
    125,082.88/172,580.16 = 80,396.80/x
  3. Step 3: Cross multiply
    125,082.88x = 172,580.16 × 80,396.80
  4. Step 4: Simplify right side
    125,082.88x = 13,874,892,607.49
  5. Step 5: Solve for x
    x = 13,874,892,607.49/125,082.88
  6. Step 6: Final answer
    x = 110,925.59

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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.