Home / 135,153.69-186,504.57-74,720.81

Finding the Fourth Proportional to 135,153.69, 186,504.57 and 74,720.81

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Solution

The fourth proportional to 135,153.69, 186,504.57 and 74,720.81 is: 103,110.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,153.69 : 186,504.57 = 74,720.81 : x
  2. Step 2: Convert to fraction form
    135,153.69/186,504.57 = 74,720.81/x
  3. Step 3: Cross multiply
    135,153.69x = 186,504.57 × 74,720.81
  4. Step 4: Simplify right side
    135,153.69x = 13,935,771,606.58
  5. Step 5: Solve for x
    x = 13,935,771,606.58/135,153.69
  6. Step 6: Final answer
    x = 103,110.55

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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.