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Finding the Fourth Proportional to 128,689.57, 193,031.62 and 35,195.32

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Solution

The fourth proportional to 128,689.57, 193,031.62 and 35,195.32 is: 52,792.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,689.57 : 193,031.62 = 35,195.32 : x
  2. Step 2: Convert to fraction form
    128,689.57/193,031.62 = 35,195.32/x
  3. Step 3: Cross multiply
    128,689.57x = 193,031.62 × 35,195.32
  4. Step 4: Simplify right side
    128,689.57x = 6,793,809,636.02
  5. Step 5: Solve for x
    x = 6,793,809,636.02/128,689.57
  6. Step 6: Final answer
    x = 52,792.23

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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.