Home / 85,289.10-128,064.86-76,016.22

Finding the Fourth Proportional to 85,289.10, 128,064.86 and 76,016.22

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Solution

The fourth proportional to 85,289.10, 128,064.86 and 76,016.22 is: 114,141.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,289.10 : 128,064.86 = 76,016.22 : x
  2. Step 2: Convert to fraction form
    85,289.10/128,064.86 = 76,016.22/x
  3. Step 3: Cross multiply
    85,289.10x = 128,064.86 × 76,016.22
  4. Step 4: Simplify right side
    85,289.10x = 9,735,006,572.03
  5. Step 5: Solve for x
    x = 9,735,006,572.03/85,289.10
  6. Step 6: Final answer
    x = 114,141.27

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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.