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Finding the Fourth Proportional to 145,891.20, 218,836.80 and 144,969.60

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Solution

The fourth proportional to 145,891.20, 218,836.80 and 144,969.60 is: 217,454.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,891.20 : 218,836.80 = 144,969.60 : x
  2. Step 2: Convert to fraction form
    145,891.20/218,836.80 = 144,969.60/x
  3. Step 3: Cross multiply
    145,891.20x = 218,836.80 × 144,969.60
  4. Step 4: Simplify right side
    145,891.20x = 31,724,683,361.28
  5. Step 5: Solve for x
    x = 31,724,683,361.28/145,891.20
  6. Step 6: Final answer
    x = 217,454.40

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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.