Home / 143,108.24-197,420.76-100,690.16

Finding the Fourth Proportional to 143,108.24, 197,420.76 and 100,690.16

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Solution

The fourth proportional to 143,108.24, 197,420.76 and 100,690.16 is: 138,904.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,108.24 : 197,420.76 = 100,690.16 : x
  2. Step 2: Convert to fraction form
    143,108.24/197,420.76 = 100,690.16/x
  3. Step 3: Cross multiply
    143,108.24x = 197,420.76 × 100,690.16
  4. Step 4: Simplify right side
    143,108.24x = 19,878,327,911.72
  5. Step 5: Solve for x
    x = 19,878,327,911.72/143,108.24
  6. Step 6: Final answer
    x = 138,904.15

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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.