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Finding the Fourth Proportional to 98,573.56, 148,525.40 and 81,427.32

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Solution

The fourth proportional to 98,573.56, 148,525.40 and 81,427.32 is: 122,690.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,573.56 : 148,525.40 = 81,427.32 : x
  2. Step 2: Convert to fraction form
    98,573.56/148,525.40 = 81,427.32/x
  3. Step 3: Cross multiply
    98,573.56x = 148,525.40 × 81,427.32
  4. Step 4: Simplify right side
    98,573.56x = 12,094,025,273.93
  5. Step 5: Solve for x
    x = 12,094,025,273.93/98,573.56
  6. Step 6: Final answer
    x = 122,690.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.