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Finding the Fourth Proportional to 218,396.31, 301,389.05 and 121,601.51

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Solution

The fourth proportional to 218,396.31, 301,389.05 and 121,601.51 is: 167,811.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,396.31 : 301,389.05 = 121,601.51 : x
  2. Step 2: Convert to fraction form
    218,396.31/301,389.05 = 121,601.51/x
  3. Step 3: Cross multiply
    218,396.31x = 301,389.05 × 121,601.51
  4. Step 4: Simplify right side
    218,396.31x = 36,649,363,577.47
  5. Step 5: Solve for x
    x = 36,649,363,577.47/218,396.31
  6. Step 6: Final answer
    x = 167,811.28

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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.