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Finding the Fourth Proportional to 72,658.51, 108,943.19 and 28,233.41

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Solution

The fourth proportional to 72,658.51, 108,943.19 and 28,233.41 is: 42,332.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,658.51 : 108,943.19 = 28,233.41 : x
  2. Step 2: Convert to fraction form
    72,658.51/108,943.19 = 28,233.41/x
  3. Step 3: Cross multiply
    72,658.51x = 108,943.19 × 28,233.41
  4. Step 4: Simplify right side
    72,658.51x = 3,075,837,064.09
  5. Step 5: Solve for x
    x = 3,075,837,064.09/72,658.51
  6. Step 6: Final answer
    x = 42,332.79

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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.