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Finding the Fourth Proportional to 66,503,620.40, 99,830,080.20 and 51,424,401.20

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Solution

The fourth proportional to 66,503,620.40, 99,830,080.20 and 51,424,401.20 is: 77,194,325.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,503,620.40 : 99,830,080.20 = 51,424,401.20 : x
  2. Step 2: Convert to fraction form
    66,503,620.40/99,830,080.20 = 51,424,401.20/x
  3. Step 3: Cross multiply
    66,503,620.40x = 99,830,080.20 × 51,424,401.20
  4. Step 4: Simplify right side
    66,503,620.40x = 5,133,702,096,032,977
  5. Step 5: Solve for x
    x = 5,133,702,096,032,977/66,503,620.40
  6. Step 6: Final answer
    x = 77,194,325.14

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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.