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Finding the Fourth Proportional to 118,699.38, 163,881.54 and 105,930.60

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Solution

The fourth proportional to 118,699.38, 163,881.54 and 105,930.60 is: 146,252.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,699.38 : 163,881.54 = 105,930.60 : x
  2. Step 2: Convert to fraction form
    118,699.38/163,881.54 = 105,930.60/x
  3. Step 3: Cross multiply
    118,699.38x = 163,881.54 × 105,930.60
  4. Step 4: Simplify right side
    118,699.38x = 17,360,069,861.12
  5. Step 5: Solve for x
    x = 17,360,069,861.12/118,699.38
  6. Step 6: Final answer
    x = 146,252.41

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1.5x scale

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.