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Finding the Fourth Proportional to 72,967.60, 100,695.30 and 39,433.60

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Solution

The fourth proportional to 72,967.60, 100,695.30 and 39,433.60 is: 54,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,967.60 : 100,695.30 = 39,433.60 : x
  2. Step 2: Convert to fraction form
    72,967.60/100,695.30 = 39,433.60/x
  3. Step 3: Cross multiply
    72,967.60x = 100,695.30 × 39,433.60
  4. Step 4: Simplify right side
    72,967.60x = 3,970,778,182.08
  5. Step 5: Solve for x
    x = 3,970,778,182.08/72,967.60
  6. Step 6: Final answer
    x = 54,418.37

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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.