Home / 115,507.81-159,556.79-87,042.63

Finding the Fourth Proportional to 115,507.81, 159,556.79 and 87,042.63

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Solution

The fourth proportional to 115,507.81, 159,556.79 and 87,042.63 is: 120,236.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,507.81 : 159,556.79 = 87,042.63 : x
  2. Step 2: Convert to fraction form
    115,507.81/159,556.79 = 87,042.63/x
  3. Step 3: Cross multiply
    115,507.81x = 159,556.79 × 87,042.63
  4. Step 4: Simplify right side
    115,507.81x = 13,888,243,125.49
  5. Step 5: Solve for x
    x = 13,888,243,125.49/115,507.81
  6. Step 6: Final answer
    x = 120,236.40

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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.