Home / 85,420.43-128,142.89-26,261.07

Finding the Fourth Proportional to 85,420.43, 128,142.89 and 26,261.07

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Solution

The fourth proportional to 85,420.43, 128,142.89 and 26,261.07 is: 39,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,420.43 : 128,142.89 = 26,261.07 : x
  2. Step 2: Convert to fraction form
    85,420.43/128,142.89 = 26,261.07/x
  3. Step 3: Cross multiply
    85,420.43x = 128,142.89 × 26,261.07
  4. Step 4: Simplify right side
    85,420.43x = 3,365,169,404.29
  5. Step 5: Solve for x
    x = 3,365,169,404.29/85,420.43
  6. Step 6: Final answer
    x = 39,395.37

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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.