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Finding the Fourth Proportional to 98,940.84, 136,555.90 and 75,027.20

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Solution

The fourth proportional to 98,940.84, 136,555.90 and 75,027.20 is: 103,550.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,940.84 : 136,555.90 = 75,027.20 : x
  2. Step 2: Convert to fraction form
    98,940.84/136,555.90 = 75,027.20/x
  3. Step 3: Cross multiply
    98,940.84x = 136,555.90 × 75,027.20
  4. Step 4: Simplify right side
    98,940.84x = 10,245,406,820.48
  5. Step 5: Solve for x
    x = 10,245,406,820.48/98,940.84
  6. Step 6: Final answer
    x = 103,550.84

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1.5x scale

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.