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Finding the Fourth Proportional to 66,866.16, 92,211.42 and 40,004.40

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Solution

The fourth proportional to 66,866.16, 92,211.42 and 40,004.40 is: 55,167.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,866.16 : 92,211.42 = 40,004.40 : x
  2. Step 2: Convert to fraction form
    66,866.16/92,211.42 = 40,004.40/x
  3. Step 3: Cross multiply
    66,866.16x = 92,211.42 × 40,004.40
  4. Step 4: Simplify right side
    66,866.16x = 3,688,862,530.25
  5. Step 5: Solve for x
    x = 3,688,862,530.25/66,866.16
  6. Step 6: Final answer
    x = 55,167.85

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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.