Home / 210,516.81-290,509.77-115,021.45

Finding the Fourth Proportional to 210,516.81, 290,509.77 and 115,021.45

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Solution

The fourth proportional to 210,516.81, 290,509.77 and 115,021.45 is: 158,727.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,516.81 : 290,509.77 = 115,021.45 : x
  2. Step 2: Convert to fraction form
    210,516.81/290,509.77 = 115,021.45/x
  3. Step 3: Cross multiply
    210,516.81x = 290,509.77 × 115,021.45
  4. Step 4: Simplify right side
    210,516.81x = 33,414,854,984.57
  5. Step 5: Solve for x
    x = 33,414,854,984.57/210,516.81
  6. Step 6: Final answer
    x = 158,727.73

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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.