Home / 133,387.35-199,130.20-128,715.37

Finding the Fourth Proportional to 133,387.35, 199,130.20 and 128,715.37

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Solution

The fourth proportional to 133,387.35, 199,130.20 and 128,715.37 is: 192,155.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,387.35 : 199,130.20 = 128,715.37 : x
  2. Step 2: Convert to fraction form
    133,387.35/199,130.20 = 128,715.37/x
  3. Step 3: Cross multiply
    133,387.35x = 199,130.20 × 128,715.37
  4. Step 4: Simplify right side
    133,387.35x = 25,631,117,371.17
  5. Step 5: Solve for x
    x = 25,631,117,371.17/133,387.35
  6. Step 6: Final answer
    x = 192,155.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.