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Finding the Fourth Proportional to 115,787.90, 173,681.85 and 56,738.90

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Solution

The fourth proportional to 115,787.90, 173,681.85 and 56,738.90 is: 85,108.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,787.90 : 173,681.85 = 56,738.90 : x
  2. Step 2: Convert to fraction form
    115,787.90/173,681.85 = 56,738.90/x
  3. Step 3: Cross multiply
    115,787.90x = 173,681.85 × 56,738.90
  4. Step 4: Simplify right side
    115,787.90x = 9,854,517,118.97
  5. Step 5: Solve for x
    x = 9,854,517,118.97/115,787.90
  6. Step 6: Final answer
    x = 85,108.35

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1.5x scale

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.