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Finding the Fourth Proportional to 223,391.78, 308,283.78 and 121,417.21

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Solution

The fourth proportional to 223,391.78, 308,283.78 and 121,417.21 is: 167,557.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,391.78 : 308,283.78 = 121,417.21 : x
  2. Step 2: Convert to fraction form
    223,391.78/308,283.78 = 121,417.21/x
  3. Step 3: Cross multiply
    223,391.78x = 308,283.78 × 121,417.21
  4. Step 4: Simplify right side
    223,391.78x = 37,430,956,455.85
  5. Step 5: Solve for x
    x = 37,430,956,455.85/223,391.78
  6. Step 6: Final answer
    x = 167,557.45

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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.