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Finding the Fourth Proportional to 71,635.40, 98,854.88 and 39,803.48

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Solution

The fourth proportional to 71,635.40, 98,854.88 and 39,803.48 is: 54,927.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,635.40 : 98,854.88 = 39,803.48 : x
  2. Step 2: Convert to fraction form
    71,635.40/98,854.88 = 39,803.48/x
  3. Step 3: Cross multiply
    71,635.40x = 98,854.88 × 39,803.48
  4. Step 4: Simplify right side
    71,635.40x = 3,934,768,238.98
  5. Step 5: Solve for x
    x = 3,934,768,238.98/71,635.40
  6. Step 6: Final answer
    x = 54,927.71

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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.