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Finding the Fourth Proportional to 84,790.56, 127,188.57 and 42,647.64

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Solution

The fourth proportional to 84,790.56, 127,188.57 and 42,647.64 is: 63,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,790.56 : 127,188.57 = 42,647.64 : x
  2. Step 2: Convert to fraction form
    84,790.56/127,188.57 = 42,647.64/x
  3. Step 3: Cross multiply
    84,790.56x = 127,188.57 × 42,647.64
  4. Step 4: Simplify right side
    84,790.56x = 5,424,292,345.47
  5. Step 5: Solve for x
    x = 5,424,292,345.47/84,790.56
  6. Step 6: Final answer
    x = 63,972.83

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1.5x scale

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.