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Finding the Fourth Proportional to 128,945.40, 193,418.10 and 97,841.40

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Solution

The fourth proportional to 128,945.40, 193,418.10 and 97,841.40 is: 146,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,945.40 : 193,418.10 = 97,841.40 : x
  2. Step 2: Convert to fraction form
    128,945.40/193,418.10 = 97,841.40/x
  3. Step 3: Cross multiply
    128,945.40x = 193,418.10 × 97,841.40
  4. Step 4: Simplify right side
    128,945.40x = 18,924,297,689.34
  5. Step 5: Solve for x
    x = 18,924,297,689.34/128,945.40
  6. Step 6: Final answer
    x = 146,762.10

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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.