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Finding the Fourth Proportional to 74,912.30, 112,368.45 and 19,508.30

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Solution

The fourth proportional to 74,912.30, 112,368.45 and 19,508.30 is: 29,262.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,912.30 : 112,368.45 = 19,508.30 : x
  2. Step 2: Convert to fraction form
    74,912.30/112,368.45 = 19,508.30/x
  3. Step 3: Cross multiply
    74,912.30x = 112,368.45 × 19,508.30
  4. Step 4: Simplify right side
    74,912.30x = 2,192,117,433.14
  5. Step 5: Solve for x
    x = 2,192,117,433.14/74,912.30
  6. Step 6: Final answer
    x = 29,262.45

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1.5x scale

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.