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Finding the Fourth Proportional to 210,783.36, 290,878.92 and 115,291.92

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Solution

The fourth proportional to 210,783.36, 290,878.92 and 115,291.92 is: 159,101.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,783.36 : 290,878.92 = 115,291.92 : x
  2. Step 2: Convert to fraction form
    210,783.36/290,878.92 = 115,291.92/x
  3. Step 3: Cross multiply
    210,783.36x = 290,878.92 × 115,291.92
  4. Step 4: Simplify right side
    210,783.36x = 33,535,989,174.33
  5. Step 5: Solve for x
    x = 33,535,989,174.33/210,783.36
  6. Step 6: Final answer
    x = 159,101.69

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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.