Home / 87,042.69-120,128.63-51,241.59

Finding the Fourth Proportional to 87,042.69, 120,128.63 and 51,241.59

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Solution

The fourth proportional to 87,042.69, 120,128.63 and 51,241.59 is: 70,719.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,042.69 : 120,128.63 = 51,241.59 : x
  2. Step 2: Convert to fraction form
    87,042.69/120,128.63 = 51,241.59/x
  3. Step 3: Cross multiply
    87,042.69x = 120,128.63 × 51,241.59
  4. Step 4: Simplify right side
    87,042.69x = 6,155,581,749.51
  5. Step 5: Solve for x
    x = 6,155,581,749.51/87,042.69
  6. Step 6: Final answer
    x = 70,719.11

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1.5x scale

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.