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Finding the Fourth Proportional to 74,917.80, 112,376.70 and 30,521.70

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Solution

The fourth proportional to 74,917.80, 112,376.70 and 30,521.70 is: 45,782.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,917.80 : 112,376.70 = 30,521.70 : x
  2. Step 2: Convert to fraction form
    74,917.80/112,376.70 = 30,521.70/x
  3. Step 3: Cross multiply
    74,917.80x = 112,376.70 × 30,521.70
  4. Step 4: Simplify right side
    74,917.80x = 3,429,927,924.39
  5. Step 5: Solve for x
    x = 3,429,927,924.39/74,917.80
  6. Step 6: Final answer
    x = 45,782.55

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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.