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Finding the Fourth Proportional to 128,669.76, 193,044.33 and 57,652.20

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Solution

The fourth proportional to 128,669.76, 193,044.33 and 57,652.20 is: 86,496.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,669.76 : 193,044.33 = 57,652.20 : x
  2. Step 2: Convert to fraction form
    128,669.76/193,044.33 = 57,652.20/x
  3. Step 3: Cross multiply
    128,669.76x = 193,044.33 × 57,652.20
  4. Step 4: Simplify right side
    128,669.76x = 11,129,430,322.03
  5. Step 5: Solve for x
    x = 11,129,430,322.03/128,669.76
  6. Step 6: Final answer
    x = 86,496.08

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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.