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Finding the Fourth Proportional to 72,590,429.70, 108,885,644.55 and 21,467,895.30

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Solution

The fourth proportional to 72,590,429.70, 108,885,644.55 and 21,467,895.30 is: 32,201,842.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,590,429.70 : 108,885,644.55 = 21,467,895.30 : x
  2. Step 2: Convert to fraction form
    72,590,429.70/108,885,644.55 = 21,467,895.30/x
  3. Step 3: Cross multiply
    72,590,429.70x = 108,885,644.55 × 21,467,895.30
  4. Step 4: Simplify right side
    72,590,429.70x = 2,337,545,616,872,415.50
  5. Step 5: Solve for x
    x = 2,337,545,616,872,415.50/72,590,429.70
  6. Step 6: Final answer
    x = 32,201,842.95

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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.