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Finding the Fourth Proportional to 118,698.60, 163,880.55 and 105,929.94

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Solution

The fourth proportional to 118,698.60, 163,880.55 and 105,929.94 is: 146,251.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,698.60 : 163,880.55 = 105,929.94 : x
  2. Step 2: Convert to fraction form
    118,698.60/163,880.55 = 105,929.94/x
  3. Step 3: Cross multiply
    118,698.60x = 163,880.55 × 105,929.94
  4. Step 4: Simplify right side
    118,698.60x = 17,359,856,828.67
  5. Step 5: Solve for x
    x = 17,359,856,828.67/118,698.60
  6. Step 6: Final answer
    x = 146,251.57

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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.