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Finding the Fourth Proportional to 62,859, 94,268.40 and 20,731.20

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Solution

The fourth proportional to 62,859, 94,268.40 and 20,731.20 is: 31,090.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,859 : 94,268.40 = 20,731.20 : x
  2. Step 2: Convert to fraction form
    62,859/94,268.40 = 20,731.20/x
  3. Step 3: Cross multiply
    62,859x = 94,268.40 × 20,731.20
  4. Step 4: Simplify right side
    62,859x = 1,954,297,054.08
  5. Step 5: Solve for x
    x = 1,954,297,054.08/62,859
  6. Step 6: Final answer
    x = 31,090.17

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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.