Home / 78,822.90-108,775.60-56,201.30

Finding the Fourth Proportional to 78,822.90, 108,775.60 and 56,201.30

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Solution

The fourth proportional to 78,822.90, 108,775.60 and 56,201.30 is: 77,557.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,822.90 : 108,775.60 = 56,201.30 : x
  2. Step 2: Convert to fraction form
    78,822.90/108,775.60 = 56,201.30/x
  3. Step 3: Cross multiply
    78,822.90x = 108,775.60 × 56,201.30
  4. Step 4: Simplify right side
    78,822.90x = 6,113,330,128.28
  5. Step 5: Solve for x
    x = 6,113,330,128.28/78,822.90
  6. Step 6: Final answer
    x = 77,557.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.