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Finding the Fourth Proportional to 216,855, 299,261.40 and 121,370.52

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Solution

The fourth proportional to 216,855, 299,261.40 and 121,370.52 is: 167,492.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,855 : 299,261.40 = 121,370.52 : x
  2. Step 2: Convert to fraction form
    216,855/299,261.40 = 121,370.52/x
  3. Step 3: Cross multiply
    216,855x = 299,261.40 × 121,370.52
  4. Step 4: Simplify right side
    216,855x = 36,321,511,733.93
  5. Step 5: Solve for x
    x = 36,321,511,733.93/216,855
  6. Step 6: Final answer
    x = 167,492.16

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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.