Home / 66,637.90-99,974.16-19,890.76

Finding the Fourth Proportional to 66,637.90, 99,974.16 and 19,890.76

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Solution

The fourth proportional to 66,637.90, 99,974.16 and 19,890.76 is: 29,841.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,637.90 : 99,974.16 = 19,890.76 : x
  2. Step 2: Convert to fraction form
    66,637.90/99,974.16 = 19,890.76/x
  3. Step 3: Cross multiply
    66,637.90x = 99,974.16 × 19,890.76
  4. Step 4: Simplify right side
    66,637.90x = 1,988,562,022.76
  5. Step 5: Solve for x
    x = 1,988,562,022.76/66,637.90
  6. Step 6: Final answer
    x = 29,841.31

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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.