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Finding the Fourth Proportional to 128,094.39, 176,770.08 and 71,505.77

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Solution

The fourth proportional to 128,094.39, 176,770.08 and 71,505.77 is: 98,677.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,094.39 : 176,770.08 = 71,505.77 : x
  2. Step 2: Convert to fraction form
    128,094.39/176,770.08 = 71,505.77/x
  3. Step 3: Cross multiply
    128,094.39x = 176,770.08 × 71,505.77
  4. Step 4: Simplify right side
    128,094.39x = 12,640,079,799.51
  5. Step 5: Solve for x
    x = 12,640,079,799.51/128,094.39
  6. Step 6: Final answer
    x = 98,677.86

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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.