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Finding the Fourth Proportional to 211,065.88, 316,615.26 and 61,308.60

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Solution

The fourth proportional to 211,065.88, 316,615.26 and 61,308.60 is: 91,967.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,065.88 : 316,615.26 = 61,308.60 : x
  2. Step 2: Convert to fraction form
    211,065.88/316,615.26 = 61,308.60/x
  3. Step 3: Cross multiply
    211,065.88x = 316,615.26 × 61,308.60
  4. Step 4: Simplify right side
    211,065.88x = 19,411,238,329.24
  5. Step 5: Solve for x
    x = 19,411,238,329.24/211,065.88
  6. Step 6: Final answer
    x = 91,967.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.