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Finding the Fourth Proportional to 218,775.51, 301,908.42 and 121,978.22

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Solution

The fourth proportional to 218,775.51, 301,908.42 and 121,978.22 is: 168,328.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,775.51 : 301,908.42 = 121,978.22 : x
  2. Step 2: Convert to fraction form
    218,775.51/301,908.42 = 121,978.22/x
  3. Step 3: Cross multiply
    218,775.51x = 301,908.42 × 121,978.22
  4. Step 4: Simplify right side
    218,775.51x = 36,826,250,165.07
  5. Step 5: Solve for x
    x = 36,826,250,165.07/218,775.51
  6. Step 6: Final answer
    x = 168,328.94

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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.