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Finding the Fourth Proportional to 316,666.88, 474,956.16 and 79,994.88

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Solution

The fourth proportional to 316,666.88, 474,956.16 and 79,994.88 is: 119,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,666.88 : 474,956.16 = 79,994.88 : x
  2. Step 2: Convert to fraction form
    316,666.88/474,956.16 = 79,994.88/x
  3. Step 3: Cross multiply
    316,666.88x = 474,956.16 × 79,994.88
  4. Step 4: Simplify right side
    316,666.88x = 37,994,061,024.46
  5. Step 5: Solve for x
    x = 37,994,061,024.46/316,666.88
  6. Step 6: Final answer
    x = 119,981.16

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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.