Home / 85,869.20-128,803.80-23,539.70

Finding the Fourth Proportional to 85,869.20, 128,803.80 and 23,539.70

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Solution

The fourth proportional to 85,869.20, 128,803.80 and 23,539.70 is: 35,309.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,869.20 : 128,803.80 = 23,539.70 : x
  2. Step 2: Convert to fraction form
    85,869.20/128,803.80 = 23,539.70/x
  3. Step 3: Cross multiply
    85,869.20x = 128,803.80 × 23,539.70
  4. Step 4: Simplify right side
    85,869.20x = 3,032,002,810.86
  5. Step 5: Solve for x
    x = 3,032,002,810.86/85,869.20
  6. Step 6: Final answer
    x = 35,309.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.