Home / 138,021.01-190,470.89-77,588.12

Finding the Fourth Proportional to 138,021.01, 190,470.89 and 77,588.12

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Solution

The fourth proportional to 138,021.01, 190,470.89 and 77,588.12 is: 107,072.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,021.01 : 190,470.89 = 77,588.12 : x
  2. Step 2: Convert to fraction form
    138,021.01/190,470.89 = 77,588.12/x
  3. Step 3: Cross multiply
    138,021.01x = 190,470.89 × 77,588.12
  4. Step 4: Simplify right side
    138,021.01x = 14,778,278,269.83
  5. Step 5: Solve for x
    x = 14,778,278,269.83/138,021.01
  6. Step 6: Final answer
    x = 107,072.67

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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.