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Finding the Fourth Proportional to 114,069.60, 171,298.80 and 81,021.60

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Solution

The fourth proportional to 114,069.60, 171,298.80 and 81,021.60 is: 121,670.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,069.60 : 171,298.80 = 81,021.60 : x
  2. Step 2: Convert to fraction form
    114,069.60/171,298.80 = 81,021.60/x
  3. Step 3: Cross multiply
    114,069.60x = 171,298.80 × 81,021.60
  4. Step 4: Simplify right side
    114,069.60x = 13,878,902,854.08
  5. Step 5: Solve for x
    x = 13,878,902,854.08/114,069.60
  6. Step 6: Final answer
    x = 121,670.48

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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.