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Finding the Fourth Proportional to 128,777.51, 193,126.71 and 89,051.72

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Solution

The fourth proportional to 128,777.51, 193,126.71 and 89,051.72 is: 133,550.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,777.51 : 193,126.71 = 89,051.72 : x
  2. Step 2: Convert to fraction form
    128,777.51/193,126.71 = 89,051.72/x
  3. Step 3: Cross multiply
    128,777.51x = 193,126.71 × 89,051.72
  4. Step 4: Simplify right side
    128,777.51x = 17,198,265,703.44
  5. Step 5: Solve for x
    x = 17,198,265,703.44/128,777.51
  6. Step 6: Final answer
    x = 133,550.23

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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.