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Finding the Fourth Proportional to 54,289.40, 81,405.30 and 19,230.20

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Solution

The fourth proportional to 54,289.40, 81,405.30 and 19,230.20 is: 28,835.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,289.40 : 81,405.30 = 19,230.20 : x
  2. Step 2: Convert to fraction form
    54,289.40/81,405.30 = 19,230.20/x
  3. Step 3: Cross multiply
    54,289.40x = 81,405.30 × 19,230.20
  4. Step 4: Simplify right side
    54,289.40x = 1,565,440,200.06
  5. Step 5: Solve for x
    x = 1,565,440,200.06/54,289.40
  6. Step 6: Final answer
    x = 28,835.10

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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.