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Finding the Fourth Proportional to 339,779.90, 509,671.47 and 103,124.63

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Solution

The fourth proportional to 339,779.90, 509,671.47 and 103,124.63 is: 154,687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,779.90 : 509,671.47 = 103,124.63 : x
  2. Step 2: Convert to fraction form
    339,779.90/509,671.47 = 103,124.63/x
  3. Step 3: Cross multiply
    339,779.90x = 509,671.47 × 103,124.63
  4. Step 4: Simplify right side
    339,779.90x = 52,559,679,216.95
  5. Step 5: Solve for x
    x = 52,559,679,216.95/339,779.90
  6. Step 6: Final answer
    x = 154,687.43

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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.