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Finding the Fourth Proportional to 148,158, 204,458.04 and 81,090

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Solution

The fourth proportional to 148,158, 204,458.04 and 81,090 is: 111,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,158 : 204,458.04 = 81,090 : x
  2. Step 2: Convert to fraction form
    148,158/204,458.04 = 81,090/x
  3. Step 3: Cross multiply
    148,158x = 204,458.04 × 81,090
  4. Step 4: Simplify right side
    148,158x = 16,579,502,463.60
  5. Step 5: Solve for x
    x = 16,579,502,463.60/148,158
  6. Step 6: Final answer
    x = 111,904.20

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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.