Home / 66,985.22-92,439.68-40,143.31

Finding the Fourth Proportional to 66,985.22, 92,439.68 and 40,143.31

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Solution

The fourth proportional to 66,985.22, 92,439.68 and 40,143.31 is: 55,397.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,985.22 : 92,439.68 = 40,143.31 : x
  2. Step 2: Convert to fraction form
    66,985.22/92,439.68 = 40,143.31/x
  3. Step 3: Cross multiply
    66,985.22x = 92,439.68 × 40,143.31
  4. Step 4: Simplify right side
    66,985.22x = 3,710,834,298.73
  5. Step 5: Solve for x
    x = 3,710,834,298.73/66,985.22
  6. Step 6: Final answer
    x = 55,397.81

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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.