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Finding the Fourth Proportional to 112,334, 155,020.92 and 72,590

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Solution

The fourth proportional to 112,334, 155,020.92 and 72,590 is: 100,174.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,334 : 155,020.92 = 72,590 : x
  2. Step 2: Convert to fraction form
    112,334/155,020.92 = 72,590/x
  3. Step 3: Cross multiply
    112,334x = 155,020.92 × 72,590
  4. Step 4: Simplify right side
    112,334x = 11,252,968,582.80
  5. Step 5: Solve for x
    x = 11,252,968,582.80/112,334
  6. Step 6: Final answer
    x = 100,174.20

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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.