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Finding the Fourth Proportional to 148,290.78, 204,641.33 and 81,222.78

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Solution

The fourth proportional to 148,290.78, 204,641.33 and 81,222.78 is: 112,087.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,290.78 : 204,641.33 = 81,222.78 : x
  2. Step 2: Convert to fraction form
    148,290.78/204,641.33 = 81,222.78/x
  3. Step 3: Cross multiply
    148,290.78x = 204,641.33 × 81,222.78
  4. Step 4: Simplify right side
    148,290.78x = 16,621,537,319.38
  5. Step 5: Solve for x
    x = 16,621,537,319.38/148,290.78
  6. Step 6: Final answer
    x = 112,087.46

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1.5x scale

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.