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Finding the Fourth Proportional to 128,776.60, 193,395.30 and 124,629.40

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Solution

The fourth proportional to 128,776.60, 193,395.30 and 124,629.40 is: 187,167.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,776.60 : 193,395.30 = 124,629.40 : x
  2. Step 2: Convert to fraction form
    128,776.60/193,395.30 = 124,629.40/x
  3. Step 3: Cross multiply
    128,776.60x = 193,395.30 × 124,629.40
  4. Step 4: Simplify right side
    128,776.60x = 24,102,740,201.82
  5. Step 5: Solve for x
    x = 24,102,740,201.82/128,776.60
  6. Step 6: Final answer
    x = 187,167.08

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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.