Home / 78,820.90-108,772.84-56,199.30

Finding the Fourth Proportional to 78,820.90, 108,772.84 and 56,199.30

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Solution

The fourth proportional to 78,820.90, 108,772.84 and 56,199.30 is: 77,555.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,820.90 : 108,772.84 = 56,199.30 : x
  2. Step 2: Convert to fraction form
    78,820.90/108,772.84 = 56,199.30/x
  3. Step 3: Cross multiply
    78,820.90x = 108,772.84 × 56,199.30
  4. Step 4: Simplify right side
    78,820.90x = 6,112,957,805.98
  5. Step 5: Solve for x
    x = 6,112,957,805.98/78,820.90
  6. Step 6: Final answer
    x = 77,555.04

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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.