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Finding the Fourth Proportional to 128,854.28, 177,815.58 and 71,493.39

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Solution

The fourth proportional to 128,854.28, 177,815.58 and 71,493.39 is: 98,659.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,854.28 : 177,815.58 = 71,493.39 : x
  2. Step 2: Convert to fraction form
    128,854.28/177,815.58 = 71,493.39/x
  3. Step 3: Cross multiply
    128,854.28x = 177,815.58 × 71,493.39
  4. Step 4: Simplify right side
    128,854.28x = 12,712,638,609.02
  5. Step 5: Solve for x
    x = 12,712,638,609.02/128,854.28
  6. Step 6: Final answer
    x = 98,659.03

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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.