Home / 142,643.28-196,833.90-85,271.11

Finding the Fourth Proportional to 142,643.28, 196,833.90 and 85,271.11

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Solution

The fourth proportional to 142,643.28, 196,833.90 and 85,271.11 is: 117,665.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,643.28 : 196,833.90 = 85,271.11 : x
  2. Step 2: Convert to fraction form
    142,643.28/196,833.90 = 85,271.11/x
  3. Step 3: Cross multiply
    142,643.28x = 196,833.90 × 85,271.11
  4. Step 4: Simplify right side
    142,643.28x = 16,784,244,966.31
  5. Step 5: Solve for x
    x = 16,784,244,966.31/142,643.28
  6. Step 6: Final answer
    x = 117,665.86

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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.