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Finding the Fourth Proportional to 421,060.06, 631,595.10 and 117,435.76

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Solution

The fourth proportional to 421,060.06, 631,595.10 and 117,435.76 is: 176,155.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,060.06 : 631,595.10 = 117,435.76 : x
  2. Step 2: Convert to fraction form
    421,060.06/631,595.10 = 117,435.76/x
  3. Step 3: Cross multiply
    421,060.06x = 631,595.10 × 117,435.76
  4. Step 4: Simplify right side
    421,060.06x = 74,171,850,580.78
  5. Step 5: Solve for x
    x = 74,171,850,580.78/421,060.06
  6. Step 6: Final answer
    x = 176,155.04

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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.