Home / 135,153.14-186,503.79-74,720.25

Finding the Fourth Proportional to 135,153.14, 186,503.79 and 74,720.25

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Solution

The fourth proportional to 135,153.14, 186,503.79 and 74,720.25 is: 103,109.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,153.14 : 186,503.79 = 74,720.25 : x
  2. Step 2: Convert to fraction form
    135,153.14/186,503.79 = 74,720.25/x
  3. Step 3: Cross multiply
    135,153.14x = 186,503.79 × 74,720.25
  4. Step 4: Simplify right side
    135,153.14x = 13,935,610,094.95
  5. Step 5: Solve for x
    x = 13,935,610,094.95/135,153.14
  6. Step 6: Final answer
    x = 103,109.78

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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.