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Finding the Fourth Proportional to 128,851.84, 193,026.24 and 88,776.28

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Solution

The fourth proportional to 128,851.84, 193,026.24 and 88,776.28 is: 132,991.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,851.84 : 193,026.24 = 88,776.28 : x
  2. Step 2: Convert to fraction form
    128,851.84/193,026.24 = 88,776.28/x
  3. Step 3: Cross multiply
    128,851.84x = 193,026.24 × 88,776.28
  4. Step 4: Simplify right side
    128,851.84x = 17,136,151,529.59
  5. Step 5: Solve for x
    x = 17,136,151,529.59/128,851.84
  6. Step 6: Final answer
    x = 132,991.13

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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.