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Finding the Fourth Proportional to 74,903.64, 112,356 and 18,744.72

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Solution

The fourth proportional to 74,903.64, 112,356 and 18,744.72 is: 28,117.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,903.64 : 112,356 = 18,744.72 : x
  2. Step 2: Convert to fraction form
    74,903.64/112,356 = 18,744.72/x
  3. Step 3: Cross multiply
    74,903.64x = 112,356 × 18,744.72
  4. Step 4: Simplify right side
    74,903.64x = 2,106,081,760.32
  5. Step 5: Solve for x
    x = 2,106,081,760.32/74,903.64
  6. Step 6: Final answer
    x = 28,117.22

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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.