Home / 85,861.09-128,865.75-59,584.28

Finding the Fourth Proportional to 85,861.09, 128,865.75 and 59,584.28

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Solution

The fourth proportional to 85,861.09, 128,865.75 and 59,584.28 is: 89,427.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,861.09 : 128,865.75 = 59,584.28 : x
  2. Step 2: Convert to fraction form
    85,861.09/128,865.75 = 59,584.28/x
  3. Step 3: Cross multiply
    85,861.09x = 128,865.75 × 59,584.28
  4. Step 4: Simplify right side
    85,861.09x = 7,678,372,632.49
  5. Step 5: Solve for x
    x = 7,678,372,632.49/85,861.09
  6. Step 6: Final answer
    x = 89,427.85

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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.