Home / 128,695.26-177,599.34-72,107.04

Finding the Fourth Proportional to 128,695.26, 177,599.34 and 72,107.04

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Solution

The fourth proportional to 128,695.26, 177,599.34 and 72,107.04 is: 99,507.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,695.26 : 177,599.34 = 72,107.04 : x
  2. Step 2: Convert to fraction form
    128,695.26/177,599.34 = 72,107.04/x
  3. Step 3: Cross multiply
    128,695.26x = 177,599.34 × 72,107.04
  4. Step 4: Simplify right side
    128,695.26x = 12,806,162,713.35
  5. Step 5: Solve for x
    x = 12,806,162,713.35/128,695.26
  6. Step 6: Final answer
    x = 99,507.65

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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.