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Finding the Fourth Proportional to 71,424.21, 98,564.87 and 39,158.44

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Solution

The fourth proportional to 71,424.21, 98,564.87 and 39,158.44 is: 54,038.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,424.21 : 98,564.87 = 39,158.44 : x
  2. Step 2: Convert to fraction form
    71,424.21/98,564.87 = 39,158.44/x
  3. Step 3: Cross multiply
    71,424.21x = 98,564.87 × 39,158.44
  4. Step 4: Simplify right side
    71,424.21x = 3,859,646,595.04
  5. Step 5: Solve for x
    x = 3,859,646,595.04/71,424.21
  6. Step 6: Final answer
    x = 54,038.35

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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.