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Finding the Fourth Proportional to 246,409.02, 340,043.99 and 138,978.72

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Solution

The fourth proportional to 246,409.02, 340,043.99 and 138,978.72 is: 191,790.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    246,409.02 : 340,043.99 = 138,978.72 : x
  2. Step 2: Convert to fraction form
    246,409.02/340,043.99 = 138,978.72/x
  3. Step 3: Cross multiply
    246,409.02x = 340,043.99 × 138,978.72
  4. Step 4: Simplify right side
    246,409.02x = 47,258,877,779.00
  5. Step 5: Solve for x
    x = 47,258,877,779.00/246,409.02
  6. Step 6: Final answer
    x = 191,790.37

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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.