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Finding the Fourth Proportional to 223,012.75, 307,757.90 and 121,038.21

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Solution

The fourth proportional to 223,012.75, 307,757.90 and 121,038.21 is: 167,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,012.75 : 307,757.90 = 121,038.21 : x
  2. Step 2: Convert to fraction form
    223,012.75/307,757.90 = 121,038.21/x
  3. Step 3: Cross multiply
    223,012.75x = 307,757.90 × 121,038.21
  4. Step 4: Simplify right side
    223,012.75x = 37,250,465,554.11
  5. Step 5: Solve for x
    x = 37,250,465,554.11/223,012.75
  6. Step 6: Final answer
    x = 167,032.90

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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.