Home / 172,068.18-258,139.16-72,170.79

Finding the Fourth Proportional to 172,068.18, 258,139.16 and 72,170.79

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Solution

The fourth proportional to 172,068.18, 258,139.16 and 72,170.79 is: 108,271.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,068.18 : 258,139.16 = 72,170.79 : x
  2. Step 2: Convert to fraction form
    172,068.18/258,139.16 = 72,170.79/x
  3. Step 3: Cross multiply
    172,068.18x = 258,139.16 × 72,170.79
  4. Step 4: Simplify right side
    172,068.18x = 18,630,107,107.14
  5. Step 5: Solve for x
    x = 18,630,107,107.14/172,068.18
  6. Step 6: Final answer
    x = 108,271.66

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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.