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Finding the Fourth Proportional to 223,420.10, 308,319.13 and 121,445.55

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Solution

The fourth proportional to 223,420.10, 308,319.13 and 121,445.55 is: 167,594.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,420.10 : 308,319.13 = 121,445.55 : x
  2. Step 2: Convert to fraction form
    223,420.10/308,319.13 = 121,445.55/x
  3. Step 3: Cross multiply
    223,420.10x = 308,319.13 × 121,445.55
  4. Step 4: Simplify right side
    223,420.10x = 37,443,986,318.37
  5. Step 5: Solve for x
    x = 37,443,986,318.37/223,420.10
  6. Step 6: Final answer
    x = 167,594.53

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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.