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Finding the Fourth Proportional to 72,967.50, 100,695.15 and 39,433.50

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Solution

The fourth proportional to 72,967.50, 100,695.15 and 39,433.50 is: 54,418.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,967.50 : 100,695.15 = 39,433.50 : x
  2. Step 2: Convert to fraction form
    72,967.50/100,695.15 = 39,433.50/x
  3. Step 3: Cross multiply
    72,967.50x = 100,695.15 × 39,433.50
  4. Step 4: Simplify right side
    72,967.50x = 3,970,762,197.53
  5. Step 5: Solve for x
    x = 3,970,762,197.53/72,967.50
  6. Step 6: Final answer
    x = 54,418.23

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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.