Home / 128,867.70-177,838.37-71,507.24

Finding the Fourth Proportional to 128,867.70, 177,838.37 and 71,507.24

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Solution

The fourth proportional to 128,867.70, 177,838.37 and 71,507.24 is: 98,680.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,867.70 : 177,838.37 = 71,507.24 : x
  2. Step 2: Convert to fraction form
    128,867.70/177,838.37 = 71,507.24/x
  3. Step 3: Cross multiply
    128,867.70x = 177,838.37 × 71,507.24
  4. Step 4: Simplify right side
    128,867.70x = 12,716,731,360.01
  5. Step 5: Solve for x
    x = 12,716,731,360.01/128,867.70
  6. Step 6: Final answer
    x = 98,680.52

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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.