Home / 84,985.20-127,218.60-49,820.40

Finding the Fourth Proportional to 84,985.20, 127,218.60 and 49,820.40

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Solution

The fourth proportional to 84,985.20, 127,218.60 and 49,820.40 is: 74,578.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,985.20 : 127,218.60 = 49,820.40 : x
  2. Step 2: Convert to fraction form
    84,985.20/127,218.60 = 49,820.40/x
  3. Step 3: Cross multiply
    84,985.20x = 127,218.60 × 49,820.40
  4. Step 4: Simplify right side
    84,985.20x = 6,338,081,539.44
  5. Step 5: Solve for x
    x = 6,338,081,539.44/84,985.20
  6. Step 6: Final answer
    x = 74,578.65

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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.