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Finding the Fourth Proportional to 57,803, 86,721.99 and 40,968.57

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Solution

The fourth proportional to 57,803, 86,721.99 and 40,968.57 is: 61,465.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,803 : 86,721.99 = 40,968.57 : x
  2. Step 2: Convert to fraction form
    57,803/86,721.99 = 40,968.57/x
  3. Step 3: Cross multiply
    57,803x = 86,721.99 × 40,968.57
  4. Step 4: Simplify right side
    57,803x = 3,552,875,713.01
  5. Step 5: Solve for x
    x = 3,552,875,713.01/57,803
  6. Step 6: Final answer
    x = 61,465.25

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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.