Home / 78,240.81-117,381.69-33,857.16

Finding the Fourth Proportional to 78,240.81, 117,381.69 and 33,857.16

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Solution

The fourth proportional to 78,240.81, 117,381.69 and 33,857.16 is: 50,794.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,240.81 : 117,381.69 = 33,857.16 : x
  2. Step 2: Convert to fraction form
    78,240.81/117,381.69 = 33,857.16/x
  3. Step 3: Cross multiply
    78,240.81x = 117,381.69 × 33,857.16
  4. Step 4: Simplify right side
    78,240.81x = 3,974,210,659.40
  5. Step 5: Solve for x
    x = 3,974,210,659.40/78,240.81
  6. Step 6: Final answer
    x = 50,794.60

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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.