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Finding the Fourth Proportional to 211,131.90, 291,348.90 and 115,632.90

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Solution

The fourth proportional to 211,131.90, 291,348.90 and 115,632.90 is: 159,566.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,131.90 : 291,348.90 = 115,632.90 : x
  2. Step 2: Convert to fraction form
    211,131.90/291,348.90 = 115,632.90/x
  3. Step 3: Cross multiply
    211,131.90x = 291,348.90 × 115,632.90
  4. Step 4: Simplify right side
    211,131.90x = 33,689,518,218.81
  5. Step 5: Solve for x
    x = 33,689,518,218.81/211,131.90
  6. Step 6: Final answer
    x = 159,566.22

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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.