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Finding the Fourth Proportional to 243,391, 365,121.10 and 74,925.38

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Solution

The fourth proportional to 243,391, 365,121.10 and 74,925.38 is: 112,398.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,391 : 365,121.10 = 74,925.38 : x
  2. Step 2: Convert to fraction form
    243,391/365,121.10 = 74,925.38/x
  3. Step 3: Cross multiply
    243,391x = 365,121.10 × 74,925.38
  4. Step 4: Simplify right side
    243,391x = 27,356,837,163.52
  5. Step 5: Solve for x
    x = 27,356,837,163.52/243,391
  6. Step 6: Final answer
    x = 112,398.72

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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.