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Finding the Fourth Proportional to 223,487.79, 308,419.20 and 121,520.13

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Solution

The fourth proportional to 223,487.79, 308,419.20 and 121,520.13 is: 167,701.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,487.79 : 308,419.20 = 121,520.13 : x
  2. Step 2: Convert to fraction form
    223,487.79/308,419.20 = 121,520.13/x
  3. Step 3: Cross multiply
    223,487.79x = 308,419.20 × 121,520.13
  4. Step 4: Simplify right side
    223,487.79x = 37,479,141,278.50
  5. Step 5: Solve for x
    x = 37,479,141,278.50/223,487.79
  6. Step 6: Final answer
    x = 167,701.07

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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.