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Finding the Fourth Proportional to 66,100, 99,130.56 and 19,341.76

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Solution

The fourth proportional to 66,100, 99,130.56 and 19,341.76 is: 29,006.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,100 : 99,130.56 = 19,341.76 : x
  2. Step 2: Convert to fraction form
    66,100/99,130.56 = 19,341.76/x
  3. Step 3: Cross multiply
    66,100x = 99,130.56 × 19,341.76
  4. Step 4: Simplify right side
    66,100x = 1,917,359,500.19
  5. Step 5: Solve for x
    x = 1,917,359,500.19/66,100
  6. Step 6: Final answer
    x = 29,006.95

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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.