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Finding the Fourth Proportional to 71,912.80, 99,239.34 and 41,715.64

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Solution

The fourth proportional to 71,912.80, 99,239.34 and 41,715.64 is: 57,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,912.80 : 99,239.34 = 41,715.64 : x
  2. Step 2: Convert to fraction form
    71,912.80/99,239.34 = 41,715.64/x
  3. Step 3: Cross multiply
    71,912.80x = 99,239.34 × 41,715.64
  4. Step 4: Simplify right side
    71,912.80x = 4,139,832,581.28
  5. Step 5: Solve for x
    x = 4,139,832,581.28/71,912.80
  6. Step 6: Final answer
    x = 57,567.40

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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.