Home / 78,427.04-117,645.68-57,429.92

Finding the Fourth Proportional to 78,427.04, 117,645.68 and 57,429.92

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Solution

The fourth proportional to 78,427.04, 117,645.68 and 57,429.92 is: 86,148.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,427.04 : 117,645.68 = 57,429.92 : x
  2. Step 2: Convert to fraction form
    78,427.04/117,645.68 = 57,429.92/x
  3. Step 3: Cross multiply
    78,427.04x = 117,645.68 × 57,429.92
  4. Step 4: Simplify right side
    78,427.04x = 6,756,381,990.75
  5. Step 5: Solve for x
    x = 6,756,381,990.75/78,427.04
  6. Step 6: Final answer
    x = 86,148.63

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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.