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Finding the Fourth Proportional to 85,015.40, 127,523.10 and 77,433.80

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Solution

The fourth proportional to 85,015.40, 127,523.10 and 77,433.80 is: 116,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,015.40 : 127,523.10 = 77,433.80 : x
  2. Step 2: Convert to fraction form
    85,015.40/127,523.10 = 77,433.80/x
  3. Step 3: Cross multiply
    85,015.40x = 127,523.10 × 77,433.80
  4. Step 4: Simplify right side
    85,015.40x = 9,874,598,220.78
  5. Step 5: Solve for x
    x = 9,874,598,220.78/85,015.40
  6. Step 6: Final answer
    x = 116,150.70

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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.