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Finding the Fourth Proportional to 172,938.51, 259,415.72 and 52,986.87

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Solution

The fourth proportional to 172,938.51, 259,415.72 and 52,986.87 is: 79,482.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,938.51 : 259,415.72 = 52,986.87 : x
  2. Step 2: Convert to fraction form
    172,938.51/259,415.72 = 52,986.87/x
  3. Step 3: Cross multiply
    172,938.51x = 259,415.72 × 52,986.87
  4. Step 4: Simplify right side
    172,938.51x = 13,745,626,766.66
  5. Step 5: Solve for x
    x = 13,745,626,766.66/172,938.51
  6. Step 6: Final answer
    x = 79,482.74

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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.