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Finding the Fourth Proportional to 66,466,202.60, 99,689,972.70 and 21,032,589.80

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Solution

The fourth proportional to 66,466,202.60, 99,689,972.70 and 21,032,589.80 is: 31,545,931.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,466,202.60 : 99,689,972.70 = 21,032,589.80 : x
  2. Step 2: Convert to fraction form
    66,466,202.60/99,689,972.70 = 21,032,589.80/x
  3. Step 3: Cross multiply
    66,466,202.60x = 99,689,972.70 × 21,032,589.80
  4. Step 4: Simplify right side
    66,466,202.60x = 2,096,738,302,972,298.50
  5. Step 5: Solve for x
    x = 2,096,738,302,972,298.50/66,466,202.60
  6. Step 6: Final answer
    x = 31,545,931.93

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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.