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Finding the Fourth Proportional to 92,811.72, 128,082.09 and 52,525.47

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Solution

The fourth proportional to 92,811.72, 128,082.09 and 52,525.47 is: 72,486.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,811.72 : 128,082.09 = 52,525.47 : x
  2. Step 2: Convert to fraction form
    92,811.72/128,082.09 = 52,525.47/x
  3. Step 3: Cross multiply
    92,811.72x = 128,082.09 × 52,525.47
  4. Step 4: Simplify right side
    92,811.72x = 6,727,571,072.79
  5. Step 5: Solve for x
    x = 6,727,571,072.79/92,811.72
  6. Step 6: Final answer
    x = 72,486.23

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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.