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Finding the Fourth Proportional to 71,995.70, 99,353.35 and 39,730.62

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Solution

The fourth proportional to 71,995.70, 99,353.35 and 39,730.62 is: 54,827.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,995.70 : 99,353.35 = 39,730.62 : x
  2. Step 2: Convert to fraction form
    71,995.70/99,353.35 = 39,730.62/x
  3. Step 3: Cross multiply
    71,995.70x = 99,353.35 × 39,730.62
  4. Step 4: Simplify right side
    71,995.70x = 3,947,370,057.95
  5. Step 5: Solve for x
    x = 3,947,370,057.95/71,995.70
  6. Step 6: Final answer
    x = 54,827.86

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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.