Home / 128,587.28-177,448.58-71,226.41

Finding the Fourth Proportional to 128,587.28, 177,448.58 and 71,226.41

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Solution

The fourth proportional to 128,587.28, 177,448.58 and 71,226.41 is: 98,291.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.28 : 177,448.58 = 71,226.41 : x
  2. Step 2: Convert to fraction form
    128,587.28/177,448.58 = 71,226.41/x
  3. Step 3: Cross multiply
    128,587.28x = 177,448.58 × 71,226.41
  4. Step 4: Simplify right side
    128,587.28x = 12,639,025,400.49
  5. Step 5: Solve for x
    x = 12,639,025,400.49/128,587.28
  6. Step 6: Final answer
    x = 98,291.41

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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.