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Finding the Fourth Proportional to 172,211.90, 258,435.40 and 59,891.00

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Solution

The fourth proportional to 172,211.90, 258,435.40 and 59,891.00 is: 89,877.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,211.90 : 258,435.40 = 59,891.00 : x
  2. Step 2: Convert to fraction form
    172,211.90/258,435.40 = 59,891.00/x
  3. Step 3: Cross multiply
    172,211.90x = 258,435.40 × 59,891.00
  4. Step 4: Simplify right side
    172,211.90x = 15,477,953,127.57
  5. Step 5: Solve for x
    x = 15,477,953,127.57/172,211.90
  6. Step 6: Final answer
    x = 89,877.37

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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.