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Finding the Fourth Proportional to 128,334.84, 177,105.82 and 70,975.88

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Solution

The fourth proportional to 128,334.84, 177,105.82 and 70,975.88 is: 97,948.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.84 : 177,105.82 = 70,975.88 : x
  2. Step 2: Convert to fraction form
    128,334.84/177,105.82 = 70,975.88/x
  3. Step 3: Cross multiply
    128,334.84x = 177,105.82 × 70,975.88
  4. Step 4: Simplify right side
    128,334.84x = 12,570,241,427.62
  5. Step 5: Solve for x
    x = 12,570,241,427.62/128,334.84
  6. Step 6: Final answer
    x = 97,948.78

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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.