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Finding the Fourth Proportional to 71,130.69, 98,165.48 and 39,298.91

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Solution

The fourth proportional to 71,130.69, 98,165.48 and 39,298.91 is: 54,235.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,130.69 : 98,165.48 = 39,298.91 : x
  2. Step 2: Convert to fraction form
    71,130.69/98,165.48 = 39,298.91/x
  3. Step 3: Cross multiply
    71,130.69x = 98,165.48 × 39,298.91
  4. Step 4: Simplify right side
    71,130.69x = 3,857,795,676.30
  5. Step 5: Solve for x
    x = 3,857,795,676.30/71,130.69
  6. Step 6: Final answer
    x = 54,235.32

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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.