Home / 143,070.12-197,435.34-79,406.28

Finding the Fourth Proportional to 143,070.12, 197,435.34 and 79,406.28

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Solution

The fourth proportional to 143,070.12, 197,435.34 and 79,406.28 is: 109,579.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,070.12 : 197,435.34 = 79,406.28 : x
  2. Step 2: Convert to fraction form
    143,070.12/197,435.34 = 79,406.28/x
  3. Step 3: Cross multiply
    143,070.12x = 197,435.34 × 79,406.28
  4. Step 4: Simplify right side
    143,070.12x = 15,677,605,889.94
  5. Step 5: Solve for x
    x = 15,677,605,889.94/143,070.12
  6. Step 6: Final answer
    x = 109,579.88

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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.