Home / 85,131.48-117,428.18-61,220.28

Finding the Fourth Proportional to 85,131.48, 117,428.18 and 61,220.28

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Solution

The fourth proportional to 85,131.48, 117,428.18 and 61,220.28 is: 84,445.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,131.48 : 117,428.18 = 61,220.28 : x
  2. Step 2: Convert to fraction form
    85,131.48/117,428.18 = 61,220.28/x
  3. Step 3: Cross multiply
    85,131.48x = 117,428.18 × 61,220.28
  4. Step 4: Simplify right side
    85,131.48x = 7,188,986,059.49
  5. Step 5: Solve for x
    x = 7,188,986,059.49/85,131.48
  6. Step 6: Final answer
    x = 84,445.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.