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Finding the Fourth Proportional to 199,588,981.80, 299,383,472.70 and 70,195,564.20

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Solution

The fourth proportional to 199,588,981.80, 299,383,472.70 and 70,195,564.20 is: 105,293,346.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,588,981.80 : 299,383,472.70 = 70,195,564.20 : x
  2. Step 2: Convert to fraction form
    199,588,981.80/299,383,472.70 = 70,195,564.20/x
  3. Step 3: Cross multiply
    199,588,981.80x = 299,383,472.70 × 70,195,564.20
  4. Step 4: Simplify right side
    199,588,981.80x = 21,015,391,778,331,796
  5. Step 5: Solve for x
    x = 21,015,391,778,331,796/199,588,981.80
  6. Step 6: Final answer
    x = 105,293,346.30

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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.