Home / 85,872.10-128,820.30-26,701.60

Finding the Fourth Proportional to 85,872.10, 128,820.30 and 26,701.60

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Solution

The fourth proportional to 85,872.10, 128,820.30 and 26,701.60 is: 40,056.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,872.10 : 128,820.30 = 26,701.60 : x
  2. Step 2: Convert to fraction form
    85,872.10/128,820.30 = 26,701.60/x
  3. Step 3: Cross multiply
    85,872.10x = 128,820.30 × 26,701.60
  4. Step 4: Simplify right side
    85,872.10x = 3,439,708,122.48
  5. Step 5: Solve for x
    x = 3,439,708,122.48/85,872.10
  6. Step 6: Final answer
    x = 40,056.18

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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.