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Finding the Fourth Proportional to 135,688.51, 203,389.13 and 45,645.51

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Solution

The fourth proportional to 135,688.51, 203,389.13 and 45,645.51 is: 68,419.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,688.51 : 203,389.13 = 45,645.51 : x
  2. Step 2: Convert to fraction form
    135,688.51/203,389.13 = 45,645.51/x
  3. Step 3: Cross multiply
    135,688.51x = 203,389.13 × 45,645.51
  4. Step 4: Simplify right side
    135,688.51x = 9,283,799,550.36
  5. Step 5: Solve for x
    x = 9,283,799,550.36/135,688.51
  6. Step 6: Final answer
    x = 68,419.94

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1.5x scale

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.