Home / 128,333.76-177,096.96-71,750.40

Finding the Fourth Proportional to 128,333.76, 177,096.96 and 71,750.40

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Solution

The fourth proportional to 128,333.76, 177,096.96 and 71,750.40 is: 99,013.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,333.76 : 177,096.96 = 71,750.40 : x
  2. Step 2: Convert to fraction form
    128,333.76/177,096.96 = 71,750.40/x
  3. Step 3: Cross multiply
    128,333.76x = 177,096.96 × 71,750.40
  4. Step 4: Simplify right side
    128,333.76x = 12,706,777,718.78
  5. Step 5: Solve for x
    x = 12,706,777,718.78/128,333.76
  6. Step 6: Final answer
    x = 99,013.52

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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.