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Finding the Fourth Proportional to 74,894.16, 112,340.92 and 19,490

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Solution

The fourth proportional to 74,894.16, 112,340.92 and 19,490 is: 29,234.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,894.16 : 112,340.92 = 19,490 : x
  2. Step 2: Convert to fraction form
    74,894.16/112,340.92 = 19,490/x
  3. Step 3: Cross multiply
    74,894.16x = 112,340.92 × 19,490
  4. Step 4: Simplify right side
    74,894.16x = 2,189,524,530.80
  5. Step 5: Solve for x
    x = 2,189,524,530.80/74,894.16
  6. Step 6: Final answer
    x = 29,234.92

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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.