Home / 278,788.32-418,182.81-76,386.15

Finding the Fourth Proportional to 278,788.32, 418,182.81 and 76,386.15

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Solution

The fourth proportional to 278,788.32, 418,182.81 and 76,386.15 is: 114,579.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,788.32 : 418,182.81 = 76,386.15 : x
  2. Step 2: Convert to fraction form
    278,788.32/418,182.81 = 76,386.15/x
  3. Step 3: Cross multiply
    278,788.32x = 418,182.81 × 76,386.15
  4. Step 4: Simplify right side
    278,788.32x = 31,943,374,852.08
  5. Step 5: Solve for x
    x = 31,943,374,852.08/278,788.32
  6. Step 6: Final answer
    x = 114,579.32

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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.