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Finding the Fourth Proportional to 279,179,389.80, 418,769,084.70 and 156,735,383.40

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Solution

The fourth proportional to 279,179,389.80, 418,769,084.70 and 156,735,383.40 is: 235,103,075.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,179,389.80 : 418,769,084.70 = 156,735,383.40 : x
  2. Step 2: Convert to fraction form
    279,179,389.80/418,769,084.70 = 156,735,383.40/x
  3. Step 3: Cross multiply
    279,179,389.80x = 418,769,084.70 × 156,735,383.40
  4. Step 4: Simplify right side
    279,179,389.80x = 65,635,933,046,521,576
  5. Step 5: Solve for x
    x = 65,635,933,046,521,576/279,179,389.80
  6. Step 6: Final answer
    x = 235,103,075.10

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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.