Home / 85,421.27-128,144.16-26,261.91

Finding the Fourth Proportional to 85,421.27, 128,144.16 and 26,261.91

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Solution

The fourth proportional to 85,421.27, 128,144.16 and 26,261.91 is: 39,396.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,421.27 : 128,144.16 = 26,261.91 : x
  2. Step 2: Convert to fraction form
    85,421.27/128,144.16 = 26,261.91/x
  3. Step 3: Cross multiply
    85,421.27x = 128,144.16 × 26,261.91
  4. Step 4: Simplify right side
    85,421.27x = 3,365,310,396.95
  5. Step 5: Solve for x
    x = 3,365,310,396.95/85,421.27
  6. Step 6: Final answer
    x = 39,396.63

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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.