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Finding the Fourth Proportional to 71,472.35, 98,643.66 and 39,651.50

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Solution

The fourth proportional to 71,472.35, 98,643.66 and 39,651.50 is: 54,725.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,472.35 : 98,643.66 = 39,651.50 : x
  2. Step 2: Convert to fraction form
    71,472.35/98,643.66 = 39,651.50/x
  3. Step 3: Cross multiply
    71,472.35x = 98,643.66 × 39,651.50
  4. Step 4: Simplify right side
    71,472.35x = 3,911,369,182.41
  5. Step 5: Solve for x
    x = 3,911,369,182.41/71,472.35
  6. Step 6: Final answer
    x = 54,725.63

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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.