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Finding the Fourth Proportional to 74,908.70, 103,373.29 and 40,917.17

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Solution

The fourth proportional to 74,908.70, 103,373.29 and 40,917.17 is: 56,465.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,908.70 : 103,373.29 = 40,917.17 : x
  2. Step 2: Convert to fraction form
    74,908.70/103,373.29 = 40,917.17/x
  3. Step 3: Cross multiply
    74,908.70x = 103,373.29 × 40,917.17
  4. Step 4: Simplify right side
    74,908.70x = 4,229,742,480.39
  5. Step 5: Solve for x
    x = 4,229,742,480.39/74,908.70
  6. Step 6: Final answer
    x = 56,465.30

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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.