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Finding the Fourth Proportional to 118,198.81, 163,111.12 and 64,483.81

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Solution

The fourth proportional to 118,198.81, 163,111.12 and 64,483.81 is: 88,985.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,198.81 : 163,111.12 = 64,483.81 : x
  2. Step 2: Convert to fraction form
    118,198.81/163,111.12 = 64,483.81/x
  3. Step 3: Cross multiply
    118,198.81x = 163,111.12 × 64,483.81
  4. Step 4: Simplify right side
    118,198.81x = 10,518,026,470.97
  5. Step 5: Solve for x
    x = 10,518,026,470.97/118,198.81
  6. Step 6: Final answer
    x = 88,985.89

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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.