Home / 128,078.40-176,740.86-71,493.36

Finding the Fourth Proportional to 128,078.40, 176,740.86 and 71,493.36

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Solution

The fourth proportional to 128,078.40, 176,740.86 and 71,493.36 is: 98,656.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,078.40 : 176,740.86 = 71,493.36 : x
  2. Step 2: Convert to fraction form
    128,078.40/176,740.86 = 71,493.36/x
  3. Step 3: Cross multiply
    128,078.40x = 176,740.86 × 71,493.36
  4. Step 4: Simplify right side
    128,078.40x = 12,635,797,930.69
  5. Step 5: Solve for x
    x = 12,635,797,930.69/128,078.40
  6. Step 6: Final answer
    x = 98,656.74

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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.