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Finding the Fourth Proportional to 145,972.20, 218,958.30 and 121,040.40

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Solution

The fourth proportional to 145,972.20, 218,958.30 and 121,040.40 is: 181,560.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,972.20 : 218,958.30 = 121,040.40 : x
  2. Step 2: Convert to fraction form
    145,972.20/218,958.30 = 121,040.40/x
  3. Step 3: Cross multiply
    145,972.20x = 218,958.30 × 121,040.40
  4. Step 4: Simplify right side
    145,972.20x = 26,502,800,215.32
  5. Step 5: Solve for x
    x = 26,502,800,215.32/145,972.20
  6. Step 6: Final answer
    x = 181,560.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.