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Finding the Fourth Proportional to 71,300.28, 98,390.16 and 39,467.28

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Solution

The fourth proportional to 71,300.28, 98,390.16 and 39,467.28 is: 54,462.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,300.28 : 98,390.16 = 39,467.28 : x
  2. Step 2: Convert to fraction form
    71,300.28/98,390.16 = 39,467.28/x
  3. Step 3: Cross multiply
    71,300.28x = 98,390.16 × 39,467.28
  4. Step 4: Simplify right side
    71,300.28x = 3,883,191,993.96
  5. Step 5: Solve for x
    x = 3,883,191,993.96/71,300.28
  6. Step 6: Final answer
    x = 54,462.51

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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.