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Finding the Fourth Proportional to 217,489.95, 300,128.30 and 120,698.04

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Solution

The fourth proportional to 217,489.95, 300,128.30 and 120,698.04 is: 166,558.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,489.95 : 300,128.30 = 120,698.04 : x
  2. Step 2: Convert to fraction form
    217,489.95/300,128.30 = 120,698.04/x
  3. Step 3: Cross multiply
    217,489.95x = 300,128.30 × 120,698.04
  4. Step 4: Simplify right side
    217,489.95x = 36,224,896,955.04
  5. Step 5: Solve for x
    x = 36,224,896,955.04/217,489.95
  6. Step 6: Final answer
    x = 166,558.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.