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Finding the Fourth Proportional to 84,671.76, 126,981.68 and 58,544.40

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Solution

The fourth proportional to 84,671.76, 126,981.68 and 58,544.40 is: 87,798.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,671.76 : 126,981.68 = 58,544.40 : x
  2. Step 2: Convert to fraction form
    84,671.76/126,981.68 = 58,544.40/x
  3. Step 3: Cross multiply
    84,671.76x = 126,981.68 × 58,544.40
  4. Step 4: Simplify right side
    84,671.76x = 7,434,066,266.59
  5. Step 5: Solve for x
    x = 7,434,066,266.59/84,671.76
  6. Step 6: Final answer
    x = 87,798.65

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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.