Home / 78,717.36-117,803.88-64,513.20

Finding the Fourth Proportional to 78,717.36, 117,803.88 and 64,513.20

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Solution

The fourth proportional to 78,717.36, 117,803.88 and 64,513.20 is: 96,546.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,717.36 : 117,803.88 = 64,513.20 : x
  2. Step 2: Convert to fraction form
    78,717.36/117,803.88 = 64,513.20/x
  3. Step 3: Cross multiply
    78,717.36x = 117,803.88 × 64,513.20
  4. Step 4: Simplify right side
    78,717.36x = 7,599,905,271.22
  5. Step 5: Solve for x
    x = 7,599,905,271.22/78,717.36
  6. Step 6: Final answer
    x = 96,546.75

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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.