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Finding the Fourth Proportional to 128,108.70, 191,903.85 and 88,710.30

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Solution

The fourth proportional to 128,108.70, 191,903.85 and 88,710.30 is: 132,885.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,108.70 : 191,903.85 = 88,710.30 : x
  2. Step 2: Convert to fraction form
    128,108.70/191,903.85 = 88,710.30/x
  3. Step 3: Cross multiply
    128,108.70x = 191,903.85 × 88,710.30
  4. Step 4: Simplify right side
    128,108.70x = 17,023,848,104.66
  5. Step 5: Solve for x
    x = 17,023,848,104.66/128,108.70
  6. Step 6: Final answer
    x = 132,885.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.