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Finding the Fourth Proportional to 53,970.30, 80,955.45 and 18,905.40

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Solution

The fourth proportional to 53,970.30, 80,955.45 and 18,905.40 is: 28,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,970.30 : 80,955.45 = 18,905.40 : x
  2. Step 2: Convert to fraction form
    53,970.30/80,955.45 = 18,905.40/x
  3. Step 3: Cross multiply
    53,970.30x = 80,955.45 × 18,905.40
  4. Step 4: Simplify right side
    53,970.30x = 1,530,495,164.43
  5. Step 5: Solve for x
    x = 1,530,495,164.43/53,970.30
  6. Step 6: Final answer
    x = 28,358.10

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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.