Home / 135,154.45-186,505.60-74,721.57

Finding the Fourth Proportional to 135,154.45, 186,505.60 and 74,721.57

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Solution

The fourth proportional to 135,154.45, 186,505.60 and 74,721.57 is: 103,111.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,154.45 : 186,505.60 = 74,721.57 : x
  2. Step 2: Convert to fraction form
    135,154.45/186,505.60 = 74,721.57/x
  3. Step 3: Cross multiply
    135,154.45x = 186,505.60 × 74,721.57
  4. Step 4: Simplify right side
    135,154.45x = 13,935,991,245.79
  5. Step 5: Solve for x
    x = 13,935,991,245.79/135,154.45
  6. Step 6: Final answer
    x = 103,111.60

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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.