Home / 142,721.39-196,955.55-78,190.92

Finding the Fourth Proportional to 142,721.39, 196,955.55 and 78,190.92

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Solution

The fourth proportional to 142,721.39, 196,955.55 and 78,190.92 is: 107,903.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,721.39 : 196,955.55 = 78,190.92 : x
  2. Step 2: Convert to fraction form
    142,721.39/196,955.55 = 78,190.92/x
  3. Step 3: Cross multiply
    142,721.39x = 196,955.55 × 78,190.92
  4. Step 4: Simplify right side
    142,721.39x = 15,400,135,653.61
  5. Step 5: Solve for x
    x = 15,400,135,653.61/142,721.39
  6. Step 6: Final answer
    x = 107,903.49

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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.