Home / 102,939.15-142,023.66-57,609.93

Finding the Fourth Proportional to 102,939.15, 142,023.66 and 57,609.93

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Solution

The fourth proportional to 102,939.15, 142,023.66 and 57,609.93 is: 79,483.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,939.15 : 142,023.66 = 57,609.93 : x
  2. Step 2: Convert to fraction form
    102,939.15/142,023.66 = 57,609.93/x
  3. Step 3: Cross multiply
    102,939.15x = 142,023.66 × 57,609.93
  4. Step 4: Simplify right side
    102,939.15x = 8,181,973,110.94
  5. Step 5: Solve for x
    x = 8,181,973,110.94/102,939.15
  6. Step 6: Final answer
    x = 79,483.59

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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.