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Finding the Fourth Proportional to 612,090, 918,187.92 and 168,858

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Solution

The fourth proportional to 612,090, 918,187.92 and 168,858 is: 253,301.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,090 : 918,187.92 = 168,858 : x
  2. Step 2: Convert to fraction form
    612,090/918,187.92 = 168,858/x
  3. Step 3: Cross multiply
    612,090x = 918,187.92 × 168,858
  4. Step 4: Simplify right side
    612,090x = 155,043,375,795.36
  5. Step 5: Solve for x
    x = 155,043,375,795.36/612,090
  6. Step 6: Final answer
    x = 253,301.60

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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.