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Finding the Fourth Proportional to 94,425.80, 141,509.10 and 76,929.80

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Solution

The fourth proportional to 94,425.80, 141,509.10 and 76,929.80 is: 115,289.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,425.80 : 141,509.10 = 76,929.80 : x
  2. Step 2: Convert to fraction form
    94,425.80/141,509.10 = 76,929.80/x
  3. Step 3: Cross multiply
    94,425.80x = 141,509.10 × 76,929.80
  4. Step 4: Simplify right side
    94,425.80x = 10,886,266,761.18
  5. Step 5: Solve for x
    x = 10,886,266,761.18/94,425.80
  6. Step 6: Final answer
    x = 115,289.11

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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.