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Finding the Fourth Proportional to 316,061.30, 474,020.80 and 91,371.67

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Solution

The fourth proportional to 316,061.30, 474,020.80 and 91,371.67 is: 137,036.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,061.30 : 474,020.80 = 91,371.67 : x
  2. Step 2: Convert to fraction form
    316,061.30/474,020.80 = 91,371.67/x
  3. Step 3: Cross multiply
    316,061.30x = 474,020.80 × 91,371.67
  4. Step 4: Simplify right side
    316,061.30x = 43,312,072,110.74
  5. Step 5: Solve for x
    x = 43,312,072,110.74/316,061.30
  6. Step 6: Final answer
    x = 137,036.94

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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.