Home / 78,399.40-117,558.78-25,802.92

Finding the Fourth Proportional to 78,399.40, 117,558.78 and 25,802.92

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Solution

The fourth proportional to 78,399.40, 117,558.78 and 25,802.92 is: 38,691.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,399.40 : 117,558.78 = 25,802.92 : x
  2. Step 2: Convert to fraction form
    78,399.40/117,558.78 = 25,802.92/x
  3. Step 3: Cross multiply
    78,399.40x = 117,558.78 × 25,802.92
  4. Step 4: Simplify right side
    78,399.40x = 3,033,359,795.64
  5. Step 5: Solve for x
    x = 3,033,359,795.64/78,399.40
  6. Step 6: Final answer
    x = 38,691.11

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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.