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Finding the Fourth Proportional to 66,727.60, 100,061.88 and 19,971.76

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Solution

The fourth proportional to 66,727.60, 100,061.88 and 19,971.76 is: 29,948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,727.60 : 100,061.88 = 19,971.76 : x
  2. Step 2: Convert to fraction form
    66,727.60/100,061.88 = 19,971.76/x
  3. Step 3: Cross multiply
    66,727.60x = 100,061.88 × 19,971.76
  4. Step 4: Simplify right side
    66,727.60x = 1,998,411,852.51
  5. Step 5: Solve for x
    x = 1,998,411,852.51/66,727.60
  6. Step 6: Final answer
    x = 29,948.80

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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.