Home / 85,613.40-128,388.51-29,438.55

Finding the Fourth Proportional to 85,613.40, 128,388.51 and 29,438.55

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Solution

The fourth proportional to 85,613.40, 128,388.51 and 29,438.55 is: 44,146.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,613.40 : 128,388.51 = 29,438.55 : x
  2. Step 2: Convert to fraction form
    85,613.40/128,388.51 = 29,438.55/x
  3. Step 3: Cross multiply
    85,613.40x = 128,388.51 × 29,438.55
  4. Step 4: Simplify right side
    85,613.40x = 3,779,571,571.06
  5. Step 5: Solve for x
    x = 3,779,571,571.06/85,613.40
  6. Step 6: Final answer
    x = 44,146.96

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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.