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Finding the Fourth Proportional to 81,656.90, 112,692.08 and 45,362.49

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Solution

The fourth proportional to 81,656.90, 112,692.08 and 45,362.49 is: 62,603.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.90 : 112,692.08 = 45,362.49 : x
  2. Step 2: Convert to fraction form
    81,656.90/112,692.08 = 45,362.49/x
  3. Step 3: Cross multiply
    81,656.90x = 112,692.08 × 45,362.49
  4. Step 4: Simplify right side
    81,656.90x = 5,111,993,465.49
  5. Step 5: Solve for x
    x = 5,111,993,465.49/81,656.90
  6. Step 6: Final answer
    x = 62,603.32

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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.