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Finding the Fourth Proportional to 209,980.60, 314,970.90 and 105,004.60

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Solution

The fourth proportional to 209,980.60, 314,970.90 and 105,004.60 is: 157,506.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,980.60 : 314,970.90 = 105,004.60 : x
  2. Step 2: Convert to fraction form
    209,980.60/314,970.90 = 105,004.60/x
  3. Step 3: Cross multiply
    209,980.60x = 314,970.90 × 105,004.60
  4. Step 4: Simplify right side
    209,980.60x = 33,073,393,366.14
  5. Step 5: Solve for x
    x = 33,073,393,366.14/209,980.60
  6. Step 6: Final answer
    x = 157,506.90

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1.5x scale

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.