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Finding the Fourth Proportional to 128,913, 193,444.77 and 54,026.94

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Solution

The fourth proportional to 128,913, 193,444.77 and 54,026.94 is: 81,071.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,913 : 193,444.77 = 54,026.94 : x
  2. Step 2: Convert to fraction form
    128,913/193,444.77 = 54,026.94/x
  3. Step 3: Cross multiply
    128,913x = 193,444.77 × 54,026.94
  4. Step 4: Simplify right side
    128,913x = 10,451,228,982.10
  5. Step 5: Solve for x
    x = 10,451,228,982.10/128,913
  6. Step 6: Final answer
    x = 81,071.96

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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.