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Finding the Fourth Proportional to 170,905.70, 256,403.35 and 65,728.10

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Solution

The fourth proportional to 170,905.70, 256,403.35 and 65,728.10 is: 98,609.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,905.70 : 256,403.35 = 65,728.10 : x
  2. Step 2: Convert to fraction form
    170,905.70/256,403.35 = 65,728.10/x
  3. Step 3: Cross multiply
    170,905.70x = 256,403.35 × 65,728.10
  4. Step 4: Simplify right side
    170,905.70x = 16,852,905,029.14
  5. Step 5: Solve for x
    x = 16,852,905,029.14/170,905.70
  6. Step 6: Final answer
    x = 98,609.38

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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.