Home / 85,406.85-128,188.67-43,316.24

Finding the Fourth Proportional to 85,406.85, 128,188.67 and 43,316.24

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Solution

The fourth proportional to 85,406.85, 128,188.67 and 43,316.24 is: 65,014.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.85 : 128,188.67 = 43,316.24 : x
  2. Step 2: Convert to fraction form
    85,406.85/128,188.67 = 43,316.24/x
  3. Step 3: Cross multiply
    85,406.85x = 128,188.67 × 43,316.24
  4. Step 4: Simplify right side
    85,406.85x = 5,552,650,337.48
  5. Step 5: Solve for x
    x = 5,552,650,337.48/85,406.85
  6. Step 6: Final answer
    x = 65,014.11

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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.