Home / 78,335.10-117,360.09-69,937.02

Finding the Fourth Proportional to 78,335.10, 117,360.09 and 69,937.02

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Solution

The fourth proportional to 78,335.10, 117,360.09 and 69,937.02 is: 104,778.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,335.10 : 117,360.09 = 69,937.02 : x
  2. Step 2: Convert to fraction form
    78,335.10/117,360.09 = 69,937.02/x
  3. Step 3: Cross multiply
    78,335.10x = 117,360.09 × 69,937.02
  4. Step 4: Simplify right side
    78,335.10x = 8,207,814,961.53
  5. Step 5: Solve for x
    x = 8,207,814,961.53/78,335.10
  6. Step 6: Final answer
    x = 104,778.25

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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.