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Finding the Fourth Proportional to 211,345.59, 291,668.81 and 125,355.59

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Solution

The fourth proportional to 211,345.59, 291,668.81 and 125,355.59 is: 172,997.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,345.59 : 291,668.81 = 125,355.59 : x
  2. Step 2: Convert to fraction form
    211,345.59/291,668.81 = 125,355.59/x
  3. Step 3: Cross multiply
    211,345.59x = 291,668.81 × 125,355.59
  4. Step 4: Simplify right side
    211,345.59x = 36,562,315,762.15
  5. Step 5: Solve for x
    x = 36,562,315,762.15/211,345.59
  6. Step 6: Final answer
    x = 172,997.77

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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.