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Finding the Fourth Proportional to 72,793,998.80, 109,190,998.20 and 56,531,904.20

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Solution

The fourth proportional to 72,793,998.80, 109,190,998.20 and 56,531,904.20 is: 84,797,856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,793,998.80 : 109,190,998.20 = 56,531,904.20 : x
  2. Step 2: Convert to fraction form
    72,793,998.80/109,190,998.20 = 56,531,904.20/x
  3. Step 3: Cross multiply
    72,793,998.80x = 109,190,998.20 × 56,531,904.20
  4. Step 4: Simplify right side
    72,793,998.80x = 6,172,775,049,744,773
  5. Step 5: Solve for x
    x = 6,172,775,049,744,773/72,793,998.80
  6. Step 6: Final answer
    x = 84,797,856.30

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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.