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Finding the Fourth Proportional to 223,258.40, 308,090.16 and 121,279.40

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Solution

The fourth proportional to 223,258.40, 308,090.16 and 121,279.40 is: 167,362.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,258.40 : 308,090.16 = 121,279.40 : x
  2. Step 2: Convert to fraction form
    223,258.40/308,090.16 = 121,279.40/x
  3. Step 3: Cross multiply
    223,258.40x = 308,090.16 × 121,279.40
  4. Step 4: Simplify right side
    223,258.40x = 37,364,989,750.70
  5. Step 5: Solve for x
    x = 37,364,989,750.70/223,258.40
  6. Step 6: Final answer
    x = 167,362.08

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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.