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Finding the Fourth Proportional to 66,739.79, 92,082.53 and 39,872.49

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Solution

The fourth proportional to 66,739.79, 92,082.53 and 39,872.49 is: 55,013.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,739.79 : 92,082.53 = 39,872.49 : x
  2. Step 2: Convert to fraction form
    66,739.79/92,082.53 = 39,872.49/x
  3. Step 3: Cross multiply
    66,739.79x = 92,082.53 × 39,872.49
  4. Step 4: Simplify right side
    66,739.79x = 3,671,559,557.24
  5. Step 5: Solve for x
    x = 3,671,559,557.24/66,739.79
  6. Step 6: Final answer
    x = 55,013.06

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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.