Home / 66,890-92,322.60-40,038.50

Finding the Fourth Proportional to 66,890, 92,322.60 and 40,038.50

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Solution

The fourth proportional to 66,890, 92,322.60 and 40,038.50 is: 55,261.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,890 : 92,322.60 = 40,038.50 : x
  2. Step 2: Convert to fraction form
    66,890/92,322.60 = 40,038.50/x
  3. Step 3: Cross multiply
    66,890x = 92,322.60 × 40,038.50
  4. Step 4: Simplify right side
    66,890x = 3,696,458,420.10
  5. Step 5: Solve for x
    x = 3,696,458,420.10/66,890
  6. Step 6: Final answer
    x = 55,261.75

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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.