Home / 128,555.01-177,406.61-71,196.21

Finding the Fourth Proportional to 128,555.01, 177,406.61 and 71,196.21

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Solution

The fourth proportional to 128,555.01, 177,406.61 and 71,196.21 is: 98,251.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555.01 : 177,406.61 = 71,196.21 : x
  2. Step 2: Convert to fraction form
    128,555.01/177,406.61 = 71,196.21/x
  3. Step 3: Cross multiply
    128,555.01x = 177,406.61 × 71,196.21
  4. Step 4: Simplify right side
    128,555.01x = 12,630,677,904.97
  5. Step 5: Solve for x
    x = 12,630,677,904.97/128,555.01
  6. Step 6: Final answer
    x = 98,251.15

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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.