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Finding the Fourth Proportional to 278,706.97, 418,171.16 and 89,196.40

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Solution

The fourth proportional to 278,706.97, 418,171.16 and 89,196.40 is: 133,830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,706.97 : 418,171.16 = 89,196.40 : x
  2. Step 2: Convert to fraction form
    278,706.97/418,171.16 = 89,196.40/x
  3. Step 3: Cross multiply
    278,706.97x = 418,171.16 × 89,196.40
  4. Step 4: Simplify right side
    278,706.97x = 37,299,362,055.82
  5. Step 5: Solve for x
    x = 37,299,362,055.82/278,706.97
  6. Step 6: Final answer
    x = 133,830.03

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1.5x scale

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.