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Finding the Fourth Proportional to 85,359.64, 128,023.98 and 23,015.56

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Solution

The fourth proportional to 85,359.64, 128,023.98 and 23,015.56 is: 34,519.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,359.64 : 128,023.98 = 23,015.56 : x
  2. Step 2: Convert to fraction form
    85,359.64/128,023.98 = 23,015.56/x
  3. Step 3: Cross multiply
    85,359.64x = 128,023.98 × 23,015.56
  4. Step 4: Simplify right side
    85,359.64x = 2,946,543,593.13
  5. Step 5: Solve for x
    x = 2,946,543,593.13/85,359.64
  6. Step 6: Final answer
    x = 34,519.17

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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.