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Finding the Fourth Proportional to 71,798.85, 99,079.74 and 39,967.07

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Solution

The fourth proportional to 71,798.85, 99,079.74 and 39,967.07 is: 55,153.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,798.85 : 99,079.74 = 39,967.07 : x
  2. Step 2: Convert to fraction form
    71,798.85/99,079.74 = 39,967.07/x
  3. Step 3: Cross multiply
    71,798.85x = 99,079.74 × 39,967.07
  4. Step 4: Simplify right side
    71,798.85x = 3,959,926,408.76
  5. Step 5: Solve for x
    x = 3,959,926,408.76/71,798.85
  6. Step 6: Final answer
    x = 55,153.06

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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.