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Finding the Fourth Proportional to 72,592,985.20, 108,889,477.80 and 36,313,279.60

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Solution

The fourth proportional to 72,592,985.20, 108,889,477.80 and 36,313,279.60 is: 54,469,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,592,985.20 : 108,889,477.80 = 36,313,279.60 : x
  2. Step 2: Convert to fraction form
    72,592,985.20/108,889,477.80 = 36,313,279.60/x
  3. Step 3: Cross multiply
    72,592,985.20x = 108,889,477.80 × 36,313,279.60
  4. Step 4: Simplify right side
    72,592,985.20x = 3,954,134,052,849,393
  5. Step 5: Solve for x
    x = 3,954,134,052,849,393/72,592,985.20
  6. Step 6: Final answer
    x = 54,469,919.40

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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.