Home / 142,653.38-196,859.24-78,989.80

Finding the Fourth Proportional to 142,653.38, 196,859.24 and 78,989.80

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Solution

The fourth proportional to 142,653.38, 196,859.24 and 78,989.80 is: 109,004.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,653.38 : 196,859.24 = 78,989.80 : x
  2. Step 2: Convert to fraction form
    142,653.38/196,859.24 = 78,989.80/x
  3. Step 3: Cross multiply
    142,653.38x = 196,859.24 × 78,989.80
  4. Step 4: Simplify right side
    142,653.38x = 15,549,871,995.75
  5. Step 5: Solve for x
    x = 15,549,871,995.75/142,653.38
  6. Step 6: Final answer
    x = 109,004.58

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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.