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Finding the Fourth Proportional to 128,798.98, 193,119.90 and 57,708.52

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Solution

The fourth proportional to 128,798.98, 193,119.90 and 57,708.52 is: 86,527.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,798.98 : 193,119.90 = 57,708.52 : x
  2. Step 2: Convert to fraction form
    128,798.98/193,119.90 = 57,708.52/x
  3. Step 3: Cross multiply
    128,798.98x = 193,119.90 × 57,708.52
  4. Step 4: Simplify right side
    128,798.98x = 11,144,663,611.55
  5. Step 5: Solve for x
    x = 11,144,663,611.55/128,798.98
  6. Step 6: Final answer
    x = 86,527.58

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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.