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Finding the Fourth Proportional to 66,451,971.20, 99,677,956.80 and 43,758,492.80

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Solution

The fourth proportional to 66,451,971.20, 99,677,956.80 and 43,758,492.80 is: 65,637,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,451,971.20 : 99,677,956.80 = 43,758,492.80 : x
  2. Step 2: Convert to fraction form
    66,451,971.20/99,677,956.80 = 43,758,492.80/x
  3. Step 3: Cross multiply
    66,451,971.20x = 99,677,956.80 × 43,758,492.80
  4. Step 4: Simplify right side
    66,451,971.20x = 4,361,757,154,951,510.50
  5. Step 5: Solve for x
    x = 4,361,757,154,951,510.50/66,451,971.20
  6. Step 6: Final answer
    x = 65,637,739.20

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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.