Home / 121,860.65-168,172.29-68,145.54

Finding the Fourth Proportional to 121,860.65, 168,172.29 and 68,145.54

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Solution

The fourth proportional to 121,860.65, 168,172.29 and 68,145.54 is: 94,043.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,860.65 : 168,172.29 = 68,145.54 : x
  2. Step 2: Convert to fraction form
    121,860.65/168,172.29 = 68,145.54/x
  3. Step 3: Cross multiply
    121,860.65x = 168,172.29 × 68,145.54
  4. Step 4: Simplify right side
    121,860.65x = 11,460,190,333.50
  5. Step 5: Solve for x
    x = 11,460,190,333.50/121,860.65
  6. Step 6: Final answer
    x = 94,043.40

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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.