Home / 128,449.48-177,258.08-71,860.72

Finding the Fourth Proportional to 128,449.48, 177,258.08 and 71,860.72

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Solution

The fourth proportional to 128,449.48, 177,258.08 and 71,860.72 is: 99,166.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,449.48 : 177,258.08 = 71,860.72 : x
  2. Step 2: Convert to fraction form
    128,449.48/177,258.08 = 71,860.72/x
  3. Step 3: Cross multiply
    128,449.48x = 177,258.08 × 71,860.72
  4. Step 4: Simplify right side
    128,449.48x = 12,737,893,254.62
  5. Step 5: Solve for x
    x = 12,737,893,254.62/128,449.48
  6. Step 6: Final answer
    x = 99,166.56

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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.