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Finding the Fourth Proportional to 77,991.98, 116,987.98 and 18,827.60

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Solution

The fourth proportional to 77,991.98, 116,987.98 and 18,827.60 is: 28,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,991.98 : 116,987.98 = 18,827.60 : x
  2. Step 2: Convert to fraction form
    77,991.98/116,987.98 = 18,827.60/x
  3. Step 3: Cross multiply
    77,991.98x = 116,987.98 × 18,827.60
  4. Step 4: Simplify right side
    77,991.98x = 2,202,602,892.25
  5. Step 5: Solve for x
    x = 2,202,602,892.25/77,991.98
  6. Step 6: Final answer
    x = 28,241.40

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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.