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Finding the Fourth Proportional to 98,927.80, 148,396.80 and 28,812.56

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Solution

The fourth proportional to 98,927.80, 148,396.80 and 28,812.56 is: 43,220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,927.80 : 148,396.80 = 28,812.56 : x
  2. Step 2: Convert to fraction form
    98,927.80/148,396.80 = 28,812.56/x
  3. Step 3: Cross multiply
    98,927.80x = 148,396.80 × 28,812.56
  4. Step 4: Simplify right side
    98,927.80x = 4,275,691,703.81
  5. Step 5: Solve for x
    x = 4,275,691,703.81/98,927.80
  6. Step 6: Final answer
    x = 43,220.33

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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.