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Finding the Fourth Proportional to 85,688.88, 128,529.54 and 23,359.38

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Solution

The fourth proportional to 85,688.88, 128,529.54 and 23,359.38 is: 35,038.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,688.88 : 128,529.54 = 23,359.38 : x
  2. Step 2: Convert to fraction form
    85,688.88/128,529.54 = 23,359.38/x
  3. Step 3: Cross multiply
    85,688.88x = 128,529.54 × 23,359.38
  4. Step 4: Simplify right side
    85,688.88x = 3,002,370,366.09
  5. Step 5: Solve for x
    x = 3,002,370,366.09/85,688.88
  6. Step 6: Final answer
    x = 35,038.04

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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.