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Finding the Fourth Proportional to 218,820.40, 301,972.08 and 118,218.40

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Solution

The fourth proportional to 218,820.40, 301,972.08 and 118,218.40 is: 163,141.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,820.40 : 301,972.08 = 118,218.40 : x
  2. Step 2: Convert to fraction form
    218,820.40/301,972.08 = 118,218.40/x
  3. Step 3: Cross multiply
    218,820.40x = 301,972.08 × 118,218.40
  4. Step 4: Simplify right side
    218,820.40x = 35,698,656,142.27
  5. Step 5: Solve for x
    x = 35,698,656,142.27/218,820.40
  6. Step 6: Final answer
    x = 163,141.35

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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.