Home / 142,145.28-196,182.41-87,729.21

Finding the Fourth Proportional to 142,145.28, 196,182.41 and 87,729.21

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Solution

The fourth proportional to 142,145.28, 196,182.41 and 87,729.21 is: 121,079.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,145.28 : 196,182.41 = 87,729.21 : x
  2. Step 2: Convert to fraction form
    142,145.28/196,182.41 = 87,729.21/x
  3. Step 3: Cross multiply
    142,145.28x = 196,182.41 × 87,729.21
  4. Step 4: Simplify right side
    142,145.28x = 17,210,927,406.55
  5. Step 5: Solve for x
    x = 17,210,927,406.55/142,145.28
  6. Step 6: Final answer
    x = 121,079.84

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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.