Home / 78,461.03-117,692.36-31,087.64

Finding the Fourth Proportional to 78,461.03, 117,692.36 and 31,087.64

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Solution

The fourth proportional to 78,461.03, 117,692.36 and 31,087.64 is: 46,631.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,461.03 : 117,692.36 = 31,087.64 : x
  2. Step 2: Convert to fraction form
    78,461.03/117,692.36 = 31,087.64/x
  3. Step 3: Cross multiply
    78,461.03x = 117,692.36 × 31,087.64
  4. Step 4: Simplify right side
    78,461.03x = 3,658,776,974.53
  5. Step 5: Solve for x
    x = 3,658,776,974.53/78,461.03
  6. Step 6: Final answer
    x = 46,631.78

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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.