Home / 143,287.84-197,739.02-78,764.12

Finding the Fourth Proportional to 143,287.84, 197,739.02 and 78,764.12

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Solution

The fourth proportional to 143,287.84, 197,739.02 and 78,764.12 is: 108,695.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,287.84 : 197,739.02 = 78,764.12 : x
  2. Step 2: Convert to fraction form
    143,287.84/197,739.02 = 78,764.12/x
  3. Step 3: Cross multiply
    143,287.84x = 197,739.02 × 78,764.12
  4. Step 4: Simplify right side
    143,287.84x = 15,574,739,899.96
  5. Step 5: Solve for x
    x = 15,574,739,899.96/143,287.84
  6. Step 6: Final answer
    x = 108,695.48

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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.