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Finding the Fourth Proportional to 71,659, 98,889.56 and 39,835.45

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Solution

The fourth proportional to 71,659, 98,889.56 and 39,835.45 is: 54,973.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,659 : 98,889.56 = 39,835.45 : x
  2. Step 2: Convert to fraction form
    71,659/98,889.56 = 39,835.45/x
  3. Step 3: Cross multiply
    71,659x = 98,889.56 × 39,835.45
  4. Step 4: Simplify right side
    71,659x = 3,939,310,122.90
  5. Step 5: Solve for x
    x = 3,939,310,122.90/71,659
  6. Step 6: Final answer
    x = 54,973.00

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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.