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Finding the Fourth Proportional to 66,410.04, 91,654.02 and 40,921.77

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Solution

The fourth proportional to 66,410.04, 91,654.02 and 40,921.77 is: 56,477.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,410.04 : 91,654.02 = 40,921.77 : x
  2. Step 2: Convert to fraction form
    66,410.04/91,654.02 = 40,921.77/x
  3. Step 3: Cross multiply
    66,410.04x = 91,654.02 × 40,921.77
  4. Step 4: Simplify right side
    66,410.04x = 3,750,644,726.02
  5. Step 5: Solve for x
    x = 3,750,644,726.02/66,410.04
  6. Step 6: Final answer
    x = 56,477.07

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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.