Home / 103,131.23-142,331.18-57,809.30

Finding the Fourth Proportional to 103,131.23, 142,331.18 and 57,809.30

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Solution

The fourth proportional to 103,131.23, 142,331.18 and 57,809.30 is: 79,782.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,131.23 : 142,331.18 = 57,809.30 : x
  2. Step 2: Convert to fraction form
    103,131.23/142,331.18 = 57,809.30/x
  3. Step 3: Cross multiply
    103,131.23x = 142,331.18 × 57,809.30
  4. Step 4: Simplify right side
    103,131.23x = 8,228,064,883.27
  5. Step 5: Solve for x
    x = 8,228,064,883.27/103,131.23
  6. Step 6: Final answer
    x = 79,782.48

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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.