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Finding the Fourth Proportional to 219,159,859, 328,731,815.40 and 65,801,929.60

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Solution

The fourth proportional to 219,159,859, 328,731,815.40 and 65,801,929.60 is: 98,700,500.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,159,859 : 328,731,815.40 = 65,801,929.60 : x
  2. Step 2: Convert to fraction form
    219,159,859/328,731,815.40 = 65,801,929.60/x
  3. Step 3: Cross multiply
    219,159,859x = 328,731,815.40 × 65,801,929.60
  4. Step 4: Simplify right side
    219,159,859x = 21,631,187,774,230,996
  5. Step 5: Solve for x
    x = 21,631,187,774,230,996/219,159,859
  6. Step 6: Final answer
    x = 98,700,500.51

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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.