Home / 85,556.28-128,144.34-65,688.60

Finding the Fourth Proportional to 85,556.28, 128,144.34 and 65,688.60

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Solution

The fourth proportional to 85,556.28, 128,144.34 and 65,688.60 is: 98,386.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,556.28 : 128,144.34 = 65,688.60 : x
  2. Step 2: Convert to fraction form
    85,556.28/128,144.34 = 65,688.60/x
  3. Step 3: Cross multiply
    85,556.28x = 128,144.34 × 65,688.60
  4. Step 4: Simplify right side
    85,556.28x = 8,417,622,292.52
  5. Step 5: Solve for x
    x = 8,417,622,292.52/85,556.28
  6. Step 6: Final answer
    x = 98,386.96

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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.