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Finding the Fourth Proportional to 66,737.60, 100,076.88 and 19,981.76

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Solution

The fourth proportional to 66,737.60, 100,076.88 and 19,981.76 is: 29,963.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,737.60 : 100,076.88 = 19,981.76 : x
  2. Step 2: Convert to fraction form
    66,737.60/100,076.88 = 19,981.76/x
  3. Step 3: Cross multiply
    66,737.60x = 100,076.88 × 19,981.76
  4. Step 4: Simplify right side
    66,737.60x = 1,999,712,197.71
  5. Step 5: Solve for x
    x = 1,999,712,197.71/66,737.60
  6. Step 6: Final answer
    x = 29,963.80

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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.