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Finding the Fourth Proportional to 128,096.70, 176,772.54 and 70,739.58

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Solution

The fourth proportional to 128,096.70, 176,772.54 and 70,739.58 is: 97,620.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,096.70 : 176,772.54 = 70,739.58 : x
  2. Step 2: Convert to fraction form
    128,096.70/176,772.54 = 70,739.58/x
  3. Step 3: Cross multiply
    128,096.70x = 176,772.54 × 70,739.58
  4. Step 4: Simplify right side
    128,096.70x = 12,504,815,235.13
  5. Step 5: Solve for x
    x = 12,504,815,235.13/128,096.70
  6. Step 6: Final answer
    x = 97,620.12

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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.