Home / 143,106.24-197,418-100,688.16

Finding the Fourth Proportional to 143,106.24, 197,418 and 100,688.16

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Solution

The fourth proportional to 143,106.24, 197,418 and 100,688.16 is: 138,901.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,106.24 : 197,418 = 100,688.16 : x
  2. Step 2: Convert to fraction form
    143,106.24/197,418 = 100,688.16/x
  3. Step 3: Cross multiply
    143,106.24x = 197,418 × 100,688.16
  4. Step 4: Simplify right side
    143,106.24x = 19,877,655,170.88
  5. Step 5: Solve for x
    x = 19,877,655,170.88/143,106.24
  6. Step 6: Final answer
    x = 138,901.39

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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.