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Finding the Fourth Proportional to 72,166.60, 108,192.30 and 30,579.40

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Solution

The fourth proportional to 72,166.60, 108,192.30 and 30,579.40 is: 45,844.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,166.60 : 108,192.30 = 30,579.40 : x
  2. Step 2: Convert to fraction form
    72,166.60/108,192.30 = 30,579.40/x
  3. Step 3: Cross multiply
    72,166.60x = 108,192.30 × 30,579.40
  4. Step 4: Simplify right side
    72,166.60x = 3,308,455,618.62
  5. Step 5: Solve for x
    x = 3,308,455,618.62/72,166.60
  6. Step 6: Final answer
    x = 45,844.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.