Home / 78,948.78-117,407.79-76,457.03

Finding the Fourth Proportional to 78,948.78, 117,407.79 and 76,457.03

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Solution

The fourth proportional to 78,948.78, 117,407.79 and 76,457.03 is: 113,702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,948.78 : 117,407.79 = 76,457.03 : x
  2. Step 2: Convert to fraction form
    78,948.78/117,407.79 = 76,457.03/x
  3. Step 3: Cross multiply
    78,948.78x = 117,407.79 × 76,457.03
  4. Step 4: Simplify right side
    78,948.78x = 8,976,650,335.22
  5. Step 5: Solve for x
    x = 8,976,650,335.22/78,948.78
  6. Step 6: Final answer
    x = 113,702.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.