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Finding the Fourth Proportional to 128,358.59, 177,134.06 and 70,996.88

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Solution

The fourth proportional to 128,358.59, 177,134.06 and 70,996.88 is: 97,975.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,358.59 : 177,134.06 = 70,996.88 : x
  2. Step 2: Convert to fraction form
    128,358.59/177,134.06 = 70,996.88/x
  3. Step 3: Cross multiply
    128,358.59x = 177,134.06 × 70,996.88
  4. Step 4: Simplify right side
    128,358.59x = 12,575,965,689.58
  5. Step 5: Solve for x
    x = 12,575,965,689.58/128,358.59
  6. Step 6: Final answer
    x = 97,975.26

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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.