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Finding the Fourth Proportional to 211,388.51, 291,718.98 and 115,894.97

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Solution

The fourth proportional to 211,388.51, 291,718.98 and 115,894.97 is: 159,936.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,388.51 : 291,718.98 = 115,894.97 : x
  2. Step 2: Convert to fraction form
    211,388.51/291,718.98 = 115,894.97/x
  3. Step 3: Cross multiply
    211,388.51x = 291,718.98 × 115,894.97
  4. Step 4: Simplify right side
    211,388.51x = 33,808,763,164.83
  5. Step 5: Solve for x
    x = 33,808,763,164.83/211,388.51
  6. Step 6: Final answer
    x = 159,936.62

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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.