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Finding the Fourth Proportional to 71,635.19, 98,855.84 and 39,803.40

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Solution

The fourth proportional to 71,635.19, 98,855.84 and 39,803.40 is: 54,928.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,635.19 : 98,855.84 = 39,803.40 : x
  2. Step 2: Convert to fraction form
    71,635.19/98,855.84 = 39,803.40/x
  3. Step 3: Cross multiply
    71,635.19x = 98,855.84 × 39,803.40
  4. Step 4: Simplify right side
    71,635.19x = 3,934,798,641.36
  5. Step 5: Solve for x
    x = 3,934,798,641.36/71,635.19
  6. Step 6: Final answer
    x = 54,928.30

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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.