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Finding the Fourth Proportional to 170,803.70, 256,205.55 and 72,499.70

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Solution

The fourth proportional to 170,803.70, 256,205.55 and 72,499.70 is: 108,749.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,803.70 : 256,205.55 = 72,499.70 : x
  2. Step 2: Convert to fraction form
    170,803.70/256,205.55 = 72,499.70/x
  3. Step 3: Cross multiply
    170,803.70x = 256,205.55 × 72,499.70
  4. Step 4: Simplify right side
    170,803.70x = 18,574,825,513.34
  5. Step 5: Solve for x
    x = 18,574,825,513.34/170,803.70
  6. Step 6: Final answer
    x = 108,749.55

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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.