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Finding the Fourth Proportional to 279,045,901.80, 418,568,852.70 and 84,955,775.40

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Solution

The fourth proportional to 279,045,901.80, 418,568,852.70 and 84,955,775.40 is: 127,433,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,045,901.80 : 418,568,852.70 = 84,955,775.40 : x
  2. Step 2: Convert to fraction form
    279,045,901.80/418,568,852.70 = 84,955,775.40/x
  3. Step 3: Cross multiply
    279,045,901.80x = 418,568,852.70 × 84,955,775.40
  4. Step 4: Simplify right side
    279,045,901.80x = 35,559,841,439,416,884
  5. Step 5: Solve for x
    x = 35,559,841,439,416,884/279,045,901.80
  6. Step 6: Final answer
    x = 127,433,663.10

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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.