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Finding the Fourth Proportional to 85,110.40, 127,665.60 and 57,116.80

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Solution

The fourth proportional to 85,110.40, 127,665.60 and 57,116.80 is: 85,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,110.40 : 127,665.60 = 57,116.80 : x
  2. Step 2: Convert to fraction form
    85,110.40/127,665.60 = 57,116.80/x
  3. Step 3: Cross multiply
    85,110.40x = 127,665.60 × 57,116.80
  4. Step 4: Simplify right side
    85,110.40x = 7,291,850,542.08
  5. Step 5: Solve for x
    x = 7,291,850,542.08/85,110.40
  6. Step 6: Final answer
    x = 85,675.20

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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.