Home / 85,666.20-128,207.70-75,168.60

Finding the Fourth Proportional to 85,666.20, 128,207.70 and 75,168.60

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Solution

The fourth proportional to 85,666.20, 128,207.70 and 75,168.60 is: 112,497.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,666.20 : 128,207.70 = 75,168.60 : x
  2. Step 2: Convert to fraction form
    85,666.20/128,207.70 = 75,168.60/x
  3. Step 3: Cross multiply
    85,666.20x = 128,207.70 × 75,168.60
  4. Step 4: Simplify right side
    85,666.20x = 9,637,193,318.22
  5. Step 5: Solve for x
    x = 9,637,193,318.22/85,666.20
  6. Step 6: Final answer
    x = 112,497.03

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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.