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Finding the Fourth Proportional to 98,786.28, 136,328.26 and 54,074.28

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Solution

The fourth proportional to 98,786.28, 136,328.26 and 54,074.28 is: 74,624.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,786.28 : 136,328.26 = 54,074.28 : x
  2. Step 2: Convert to fraction form
    98,786.28/136,328.26 = 54,074.28/x
  3. Step 3: Cross multiply
    98,786.28x = 136,328.26 × 54,074.28
  4. Step 4: Simplify right side
    98,786.28x = 7,371,852,503.15
  5. Step 5: Solve for x
    x = 7,371,852,503.15/98,786.28
  6. Step 6: Final answer
    x = 74,624.25

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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.