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Finding the Fourth Proportional to 92,891.38, 128,243.20 and 61,152.54

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Solution

The fourth proportional to 92,891.38, 128,243.20 and 61,152.54 is: 84,425.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,891.38 : 128,243.20 = 61,152.54 : x
  2. Step 2: Convert to fraction form
    92,891.38/128,243.20 = 61,152.54/x
  3. Step 3: Cross multiply
    92,891.38x = 128,243.20 × 61,152.54
  4. Step 4: Simplify right side
    92,891.38x = 7,842,397,417.73
  5. Step 5: Solve for x
    x = 7,842,397,417.73/92,891.38
  6. Step 6: Final answer
    x = 84,425.46

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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.