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Finding the Fourth Proportional to 66,737.70, 92,088.90 and 39,874.50

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Solution

The fourth proportional to 66,737.70, 92,088.90 and 39,874.50 is: 55,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,737.70 : 92,088.90 = 39,874.50 : x
  2. Step 2: Convert to fraction form
    66,737.70/92,088.90 = 39,874.50/x
  3. Step 3: Cross multiply
    66,737.70x = 92,088.90 × 39,874.50
  4. Step 4: Simplify right side
    66,737.70x = 3,671,998,843.05
  5. Step 5: Solve for x
    x = 3,671,998,843.05/66,737.70
  6. Step 6: Final answer
    x = 55,021.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.