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Finding the Fourth Proportional to 54,353.40, 81,497.70 and 28,109.40

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Solution

The fourth proportional to 54,353.40, 81,497.70 and 28,109.40 is: 42,147.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,353.40 : 81,497.70 = 28,109.40 : x
  2. Step 2: Convert to fraction form
    54,353.40/81,497.70 = 28,109.40/x
  3. Step 3: Cross multiply
    54,353.40x = 81,497.70 × 28,109.40
  4. Step 4: Simplify right side
    54,353.40x = 2,290,851,448.38
  5. Step 5: Solve for x
    x = 2,290,851,448.38/54,353.40
  6. Step 6: Final answer
    x = 42,147.34

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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.