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Finding the Fourth Proportional to 140,881.72, 194,418.12 and 77,220.76

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Solution

The fourth proportional to 140,881.72, 194,418.12 and 77,220.76 is: 106,565.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,881.72 : 194,418.12 = 77,220.76 : x
  2. Step 2: Convert to fraction form
    140,881.72/194,418.12 = 77,220.76/x
  3. Step 3: Cross multiply
    140,881.72x = 194,418.12 × 77,220.76
  4. Step 4: Simplify right side
    140,881.72x = 15,013,114,984.17
  5. Step 5: Solve for x
    x = 15,013,114,984.17/140,881.72
  6. Step 6: Final answer
    x = 106,565.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.