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Finding the Fourth Proportional to 72,582,676.80, 108,883,346.40 and 36,209,659.20

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Solution

The fourth proportional to 72,582,676.80, 108,883,346.40 and 36,209,659.20 is: 54,319,143.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,582,676.80 : 108,883,346.40 = 36,209,659.20 : x
  2. Step 2: Convert to fraction form
    72,582,676.80/108,883,346.40 = 36,209,659.20/x
  3. Step 3: Cross multiply
    72,582,676.80x = 108,883,346.40 × 36,209,659.20
  4. Step 4: Simplify right side
    72,582,676.80x = 3,942,628,865,699,547.50
  5. Step 5: Solve for x
    x = 3,942,628,865,699,547.50/72,582,676.80
  6. Step 6: Final answer
    x = 54,319,143.90

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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.