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Finding the Fourth Proportional to 128,051.15, 176,759.01 and 96,311.70

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Solution

The fourth proportional to 128,051.15, 176,759.01 and 96,311.70 is: 132,946.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,051.15 : 176,759.01 = 96,311.70 : x
  2. Step 2: Convert to fraction form
    128,051.15/176,759.01 = 96,311.70/x
  3. Step 3: Cross multiply
    128,051.15x = 176,759.01 × 96,311.70
  4. Step 4: Simplify right side
    128,051.15x = 17,023,960,743.42
  5. Step 5: Solve for x
    x = 17,023,960,743.42/128,051.15
  6. Step 6: Final answer
    x = 132,946.57

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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.