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Finding the Fourth Proportional to 74,662.40, 112,019.20 and 33,139.20

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Solution

The fourth proportional to 74,662.40, 112,019.20 and 33,139.20 is: 49,720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,662.40 : 112,019.20 = 33,139.20 : x
  2. Step 2: Convert to fraction form
    74,662.40/112,019.20 = 33,139.20/x
  3. Step 3: Cross multiply
    74,662.40x = 112,019.20 × 33,139.20
  4. Step 4: Simplify right side
    74,662.40x = 3,712,226,672.64
  5. Step 5: Solve for x
    x = 3,712,226,672.64/74,662.40
  6. Step 6: Final answer
    x = 49,720.16

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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.