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Finding the Fourth Proportional to 85,439.61, 128,159.42 and 23,114.97

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Solution

The fourth proportional to 85,439.61, 128,159.42 and 23,114.97 is: 34,672.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,439.61 : 128,159.42 = 23,114.97 : x
  2. Step 2: Convert to fraction form
    85,439.61/128,159.42 = 23,114.97/x
  3. Step 3: Cross multiply
    85,439.61x = 128,159.42 × 23,114.97
  4. Step 4: Simplify right side
    85,439.61x = 2,962,401,032.94
  5. Step 5: Solve for x
    x = 2,962,401,032.94/85,439.61
  6. Step 6: Final answer
    x = 34,672.46

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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.