Home / 143,139.02-197,540.80-82,720.70

Finding the Fourth Proportional to 143,139.02, 197,540.80 and 82,720.70

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Solution

The fourth proportional to 143,139.02, 197,540.80 and 82,720.70 is: 114,159.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,139.02 : 197,540.80 = 82,720.70 : x
  2. Step 2: Convert to fraction form
    143,139.02/197,540.80 = 82,720.70/x
  3. Step 3: Cross multiply
    143,139.02x = 197,540.80 × 82,720.70
  4. Step 4: Simplify right side
    143,139.02x = 16,340,713,254.56
  5. Step 5: Solve for x
    x = 16,340,713,254.56/143,139.02
  6. Step 6: Final answer
    x = 114,159.74

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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.