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Finding the Fourth Proportional to 121,807.60, 168,095.40 and 68,094.80

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Solution

The fourth proportional to 121,807.60, 168,095.40 and 68,094.80 is: 93,971.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,807.60 : 168,095.40 = 68,094.80 : x
  2. Step 2: Convert to fraction form
    121,807.60/168,095.40 = 68,094.80/x
  3. Step 3: Cross multiply
    121,807.60x = 168,095.40 × 68,094.80
  4. Step 4: Simplify right side
    121,807.60x = 11,446,422,643.92
  5. Step 5: Solve for x
    x = 11,446,422,643.92/121,807.60
  6. Step 6: Final answer
    x = 93,971.33

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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.