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Finding the Fourth Proportional to 71,129.71, 98,157.72 and 39,300.76

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Solution

The fourth proportional to 71,129.71, 98,157.72 and 39,300.76 is: 54,234.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,129.71 : 98,157.72 = 39,300.76 : x
  2. Step 2: Convert to fraction form
    71,129.71/98,157.72 = 39,300.76/x
  3. Step 3: Cross multiply
    71,129.71x = 98,157.72 × 39,300.76
  4. Step 4: Simplify right side
    71,129.71x = 3,857,672,995.87
  5. Step 5: Solve for x
    x = 3,857,672,995.87/71,129.71
  6. Step 6: Final answer
    x = 54,234.34

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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.