Home / 128,330.48-177,096.66-71,740.64

Finding the Fourth Proportional to 128,330.48, 177,096.66 and 71,740.64

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Solution

The fourth proportional to 128,330.48, 177,096.66 and 71,740.64 is: 99,002.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,330.48 : 177,096.66 = 71,740.64 : x
  2. Step 2: Convert to fraction form
    128,330.48/177,096.66 = 71,740.64/x
  3. Step 3: Cross multiply
    128,330.48x = 177,096.66 × 71,740.64
  4. Step 4: Simplify right side
    128,330.48x = 12,705,027,730.26
  5. Step 5: Solve for x
    x = 12,705,027,730.26/128,330.48
  6. Step 6: Final answer
    x = 99,002.42

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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.