Home / 90,870.26-125,407.04-55,063.80

Finding the Fourth Proportional to 90,870.26, 125,407.04 and 55,063.80

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Solution

The fourth proportional to 90,870.26, 125,407.04 and 55,063.80 is: 75,991.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,870.26 : 125,407.04 = 55,063.80 : x
  2. Step 2: Convert to fraction form
    90,870.26/125,407.04 = 55,063.80/x
  3. Step 3: Cross multiply
    90,870.26x = 125,407.04 × 55,063.80
  4. Step 4: Simplify right side
    90,870.26x = 6,905,387,893.83
  5. Step 5: Solve for x
    x = 6,905,387,893.83/90,870.26
  6. Step 6: Final answer
    x = 75,991.73

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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.