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Finding the Fourth Proportional to 218,671.10, 301,771.95 and 123,172.10

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Solution

The fourth proportional to 218,671.10, 301,771.95 and 123,172.10 is: 169,980.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,671.10 : 301,771.95 = 123,172.10 : x
  2. Step 2: Convert to fraction form
    218,671.10/301,771.95 = 123,172.10/x
  3. Step 3: Cross multiply
    218,671.10x = 301,771.95 × 123,172.10
  4. Step 4: Simplify right side
    218,671.10x = 37,169,884,802.60
  5. Step 5: Solve for x
    x = 37,169,884,802.60/218,671.10
  6. Step 6: Final answer
    x = 169,980.78

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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.