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Finding the Fourth Proportional to 266,612,618.89, 399,815,536.69 and 91,702,395.01

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Solution

The fourth proportional to 266,612,618.89, 399,815,536.69 and 91,702,395.01 is: 137,518,030.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,612,618.89 : 399,815,536.69 = 91,702,395.01 : x
  2. Step 2: Convert to fraction form
    266,612,618.89/399,815,536.69 = 91,702,395.01/x
  3. Step 3: Cross multiply
    266,612,618.89x = 399,815,536.69 × 91,702,395.01
  4. Step 4: Simplify right side
    266,612,618.89x = 36,664,042,274,223,936
  5. Step 5: Solve for x
    x = 36,664,042,274,223,936/266,612,618.89
  6. Step 6: Final answer
    x = 137,518,030.57

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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.