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Finding the Fourth Proportional to 251,281.86, 346,770.09 and 138,111.90

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Solution

The fourth proportional to 251,281.86, 346,770.09 and 138,111.90 is: 190,595.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,281.86 : 346,770.09 = 138,111.90 : x
  2. Step 2: Convert to fraction form
    251,281.86/346,770.09 = 138,111.90/x
  3. Step 3: Cross multiply
    251,281.86x = 346,770.09 × 138,111.90
  4. Step 4: Simplify right side
    251,281.86x = 47,893,075,993.07
  5. Step 5: Solve for x
    x = 47,893,075,993.07/251,281.86
  6. Step 6: Final answer
    x = 190,595.04

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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.