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Finding the Fourth Proportional to 65,855,861.13, 90,881,819.46 and 36,487,656.30

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Solution

The fourth proportional to 65,855,861.13, 90,881,819.46 and 36,487,656.30 is: 50,353,370.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,855,861.13 : 90,881,819.46 = 36,487,656.30 : x
  2. Step 2: Convert to fraction form
    65,855,861.13/90,881,819.46 = 36,487,656.30/x
  3. Step 3: Cross multiply
    65,855,861.13x = 90,881,819.46 × 36,487,656.30
  4. Step 4: Simplify right side
    65,855,861.13x = 3,316,064,592,375,131
  5. Step 5: Solve for x
    x = 3,316,064,592,375,131/65,855,861.13
  6. Step 6: Final answer
    x = 50,353,370.76

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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.