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Finding the Fourth Proportional to 163,920.40, 245,880.60 and 53,112.40

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Solution

The fourth proportional to 163,920.40, 245,880.60 and 53,112.40 is: 79,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,920.40 : 245,880.60 = 53,112.40 : x
  2. Step 2: Convert to fraction form
    163,920.40/245,880.60 = 53,112.40/x
  3. Step 3: Cross multiply
    163,920.40x = 245,880.60 × 53,112.40
  4. Step 4: Simplify right side
    163,920.40x = 13,059,308,779.44
  5. Step 5: Solve for x
    x = 13,059,308,779.44/163,920.40
  6. Step 6: Final answer
    x = 79,668.60

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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.