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Finding the Fourth Proportional to 216,581.76, 298,886.76 and 121,078.26

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Solution

The fourth proportional to 216,581.76, 298,886.76 and 121,078.26 is: 167,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,581.76 : 298,886.76 = 121,078.26 : x
  2. Step 2: Convert to fraction form
    216,581.76/298,886.76 = 121,078.26/x
  3. Step 3: Cross multiply
    216,581.76x = 298,886.76 × 121,078.26
  4. Step 4: Simplify right side
    216,581.76x = 36,188,688,837.84
  5. Step 5: Solve for x
    x = 36,188,688,837.84/216,581.76
  6. Step 6: Final answer
    x = 167,090.20

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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.