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Finding the Fourth Proportional to 128,124.66, 192,077.64 and 90,566.58

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Solution

The fourth proportional to 128,124.66, 192,077.64 and 90,566.58 is: 135,772.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,124.66 : 192,077.64 = 90,566.58 : x
  2. Step 2: Convert to fraction form
    128,124.66/192,077.64 = 90,566.58/x
  3. Step 3: Cross multiply
    128,124.66x = 192,077.64 × 90,566.58
  4. Step 4: Simplify right side
    128,124.66x = 17,395,815,256.70
  5. Step 5: Solve for x
    x = 17,395,815,256.70/128,124.66
  6. Step 6: Final answer
    x = 135,772.58

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1.5x scale

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.