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Finding the Fourth Proportional to 67,165,903.80, 100,748,855.70 and 21,727,698.30

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Solution

The fourth proportional to 67,165,903.80, 100,748,855.70 and 21,727,698.30 is: 32,591,547.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,165,903.80 : 100,748,855.70 = 21,727,698.30 : x
  2. Step 2: Convert to fraction form
    67,165,903.80/100,748,855.70 = 21,727,698.30/x
  3. Step 3: Cross multiply
    67,165,903.80x = 100,748,855.70 × 21,727,698.30
  4. Step 4: Simplify right side
    67,165,903.80x = 2,189,040,740,719,835.50
  5. Step 5: Solve for x
    x = 2,189,040,740,719,835.50/67,165,903.80
  6. Step 6: Final answer
    x = 32,591,547.45

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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.