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Finding the Fourth Proportional to 61,405.92, 92,108.88 and 19,856.16

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Solution

The fourth proportional to 61,405.92, 92,108.88 and 19,856.16 is: 29,784.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,405.92 : 92,108.88 = 19,856.16 : x
  2. Step 2: Convert to fraction form
    61,405.92/92,108.88 = 19,856.16/x
  3. Step 3: Cross multiply
    61,405.92x = 92,108.88 × 19,856.16
  4. Step 4: Simplify right side
    61,405.92x = 1,828,928,658.70
  5. Step 5: Solve for x
    x = 1,828,928,658.70/61,405.92
  6. Step 6: Final answer
    x = 29,784.24

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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.