Home / 278,810.03-418,214.28-79,130.61

Finding the Fourth Proportional to 278,810.03, 418,214.28 and 79,130.61

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Solution

The fourth proportional to 278,810.03, 418,214.28 and 79,130.61 is: 118,695.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,810.03 : 418,214.28 = 79,130.61 : x
  2. Step 2: Convert to fraction form
    278,810.03/418,214.28 = 79,130.61/x
  3. Step 3: Cross multiply
    278,810.03x = 418,214.28 × 79,130.61
  4. Step 4: Simplify right side
    278,810.03x = 33,093,551,087.11
  5. Step 5: Solve for x
    x = 33,093,551,087.11/278,810.03
  6. Step 6: Final answer
    x = 118,695.70

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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.