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Finding the Fourth Proportional to 128,311.62, 177,092.91 and 77,333.46

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Solution

The fourth proportional to 128,311.62, 177,092.91 and 77,333.46 is: 106,733.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311.62 : 177,092.91 = 77,333.46 : x
  2. Step 2: Convert to fraction form
    128,311.62/177,092.91 = 77,333.46/x
  3. Step 3: Cross multiply
    128,311.62x = 177,092.91 × 77,333.46
  4. Step 4: Simplify right side
    128,311.62x = 13,695,207,471.77
  5. Step 5: Solve for x
    x = 13,695,207,471.77/128,311.62
  6. Step 6: Final answer
    x = 106,733.96

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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.