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Finding the Fourth Proportional to 188,307.09, 259,870.01 and 103,432.05

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Solution

The fourth proportional to 188,307.09, 259,870.01 and 103,432.05 is: 142,739.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,307.09 : 259,870.01 = 103,432.05 : x
  2. Step 2: Convert to fraction form
    188,307.09/259,870.01 = 103,432.05/x
  3. Step 3: Cross multiply
    188,307.09x = 259,870.01 × 103,432.05
  4. Step 4: Simplify right side
    188,307.09x = 26,878,887,350.66
  5. Step 5: Solve for x
    x = 26,878,887,350.66/188,307.09
  6. Step 6: Final answer
    x = 142,739.65

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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.