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Finding the Fourth Proportional to 81,172.38, 112,017.55 and 45,362.38

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Solution

The fourth proportional to 81,172.38, 112,017.55 and 45,362.38 is: 62,599.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,172.38 : 112,017.55 = 45,362.38 : x
  2. Step 2: Convert to fraction form
    81,172.38/112,017.55 = 45,362.38/x
  3. Step 3: Cross multiply
    81,172.38x = 112,017.55 × 45,362.38
  4. Step 4: Simplify right side
    81,172.38x = 5,081,382,669.77
  5. Step 5: Solve for x
    x = 5,081,382,669.77/81,172.38
  6. Step 6: Final answer
    x = 62,599.90

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1.5x scale

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.