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Finding the Fourth Proportional to 118,703.09, 177,931.59 and 74,227.74

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Solution

The fourth proportional to 118,703.09, 177,931.59 and 74,227.74 is: 111,264.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,703.09 : 177,931.59 = 74,227.74 : x
  2. Step 2: Convert to fraction form
    118,703.09/177,931.59 = 74,227.74/x
  3. Step 3: Cross multiply
    118,703.09x = 177,931.59 × 74,227.74
  4. Step 4: Simplify right side
    118,703.09x = 13,207,459,800.31
  5. Step 5: Solve for x
    x = 13,207,459,800.31/118,703.09
  6. Step 6: Final answer
    x = 111,264.67

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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.