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Finding the Fourth Proportional to 118,748, 163,873.32 and 81,021.44

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Solution

The fourth proportional to 118,748, 163,873.32 and 81,021.44 is: 111,810.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,748 : 163,873.32 = 81,021.44 : x
  2. Step 2: Convert to fraction form
    118,748/163,873.32 = 81,021.44/x
  3. Step 3: Cross multiply
    118,748x = 163,873.32 × 81,021.44
  4. Step 4: Simplify right side
    118,748x = 13,277,252,363.98
  5. Step 5: Solve for x
    x = 13,277,252,363.98/118,748
  6. Step 6: Final answer
    x = 111,810.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.