Home / 90,820.31-125,335.01-56,817.92

Finding the Fourth Proportional to 90,820.31, 125,335.01 and 56,817.92

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Solution

The fourth proportional to 90,820.31, 125,335.01 and 56,817.92 is: 78,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,820.31 : 125,335.01 = 56,817.92 : x
  2. Step 2: Convert to fraction form
    90,820.31/125,335.01 = 56,817.92/x
  3. Step 3: Cross multiply
    90,820.31x = 125,335.01 × 56,817.92
  4. Step 4: Simplify right side
    90,820.31x = 7,121,275,026.76
  5. Step 5: Solve for x
    x = 7,121,275,026.76/90,820.31
  6. Step 6: Final answer
    x = 78,410.60

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1.5x scale

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.