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Finding the Fourth Proportional to 135,144.84, 186,498.90 and 74,718.12

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Solution

The fourth proportional to 135,144.84, 186,498.90 and 74,718.12 is: 103,110.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,144.84 : 186,498.90 = 74,718.12 : x
  2. Step 2: Convert to fraction form
    135,144.84/186,498.90 = 74,718.12/x
  3. Step 3: Cross multiply
    135,144.84x = 186,498.90 × 74,718.12
  4. Step 4: Simplify right side
    135,144.84x = 13,934,847,190.07
  5. Step 5: Solve for x
    x = 13,934,847,190.07/135,144.84
  6. Step 6: Final answer
    x = 103,110.46

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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.