Home / 85,775.40-128,668.14-33,185.16

Finding the Fourth Proportional to 85,775.40, 128,668.14 and 33,185.16

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Solution

The fourth proportional to 85,775.40, 128,668.14 and 33,185.16 is: 49,779.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,775.40 : 128,668.14 = 33,185.16 : x
  2. Step 2: Convert to fraction form
    85,775.40/128,668.14 = 33,185.16/x
  3. Step 3: Cross multiply
    85,775.40x = 128,668.14 × 33,185.16
  4. Step 4: Simplify right side
    85,775.40x = 4,269,872,812.80
  5. Step 5: Solve for x
    x = 4,269,872,812.80/85,775.40
  6. Step 6: Final answer
    x = 49,779.69

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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.