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Finding the Fourth Proportional to 128,591.58, 177,427.68 and 77,612.58

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Solution

The fourth proportional to 128,591.58, 177,427.68 and 77,612.58 is: 107,088.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.58 : 177,427.68 = 77,612.58 : x
  2. Step 2: Convert to fraction form
    128,591.58/177,427.68 = 77,612.58/x
  3. Step 3: Cross multiply
    128,591.58x = 177,427.68 × 77,612.58
  4. Step 4: Simplify right side
    128,591.58x = 13,770,620,008.21
  5. Step 5: Solve for x
    x = 13,770,620,008.21/128,591.58
  6. Step 6: Final answer
    x = 107,088.04

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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.