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Finding the Fourth Proportional to 128,366.56, 177,132.22 and 70,996.76

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Solution

The fourth proportional to 128,366.56, 177,132.22 and 70,996.76 is: 97,967.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,366.56 : 177,132.22 = 70,996.76 : x
  2. Step 2: Convert to fraction form
    128,366.56/177,132.22 = 70,996.76/x
  3. Step 3: Cross multiply
    128,366.56x = 177,132.22 × 70,996.76
  4. Step 4: Simplify right side
    128,366.56x = 12,575,813,799.45
  5. Step 5: Solve for x
    x = 12,575,813,799.45/128,366.56
  6. Step 6: Final answer
    x = 97,967.99

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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.