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Finding the Fourth Proportional to 266,987,518.40, 400,481,277.60 and 85,247,998.40

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Solution

The fourth proportional to 266,987,518.40, 400,481,277.60 and 85,247,998.40 is: 127,871,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,987,518.40 : 400,481,277.60 = 85,247,998.40 : x
  2. Step 2: Convert to fraction form
    266,987,518.40/400,481,277.60 = 85,247,998.40/x
  3. Step 3: Cross multiply
    266,987,518.40x = 400,481,277.60 × 85,247,998.40
  4. Step 4: Simplify right side
    266,987,518.40x = 34,140,227,312,074,760
  5. Step 5: Solve for x
    x = 34,140,227,312,074,760/266,987,518.40
  6. Step 6: Final answer
    x = 127,871,997.60

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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.