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Finding the Fourth Proportional to 316,561, 474,836.10 and 79,901.96

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Solution

The fourth proportional to 316,561, 474,836.10 and 79,901.96 is: 119,851.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,561 : 474,836.10 = 79,901.96 : x
  2. Step 2: Convert to fraction form
    316,561/474,836.10 = 79,901.96/x
  3. Step 3: Cross multiply
    316,561x = 474,836.10 × 79,901.96
  4. Step 4: Simplify right side
    316,561x = 37,940,335,068.76
  5. Step 5: Solve for x
    x = 37,940,335,068.76/316,561
  6. Step 6: Final answer
    x = 119,851.58

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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.