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Finding the Fourth Proportional to 172,004.40, 258,006.60 and 83,430.90

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Solution

The fourth proportional to 172,004.40, 258,006.60 and 83,430.90 is: 125,146.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,004.40 : 258,006.60 = 83,430.90 : x
  2. Step 2: Convert to fraction form
    172,004.40/258,006.60 = 83,430.90/x
  3. Step 3: Cross multiply
    172,004.40x = 258,006.60 × 83,430.90
  4. Step 4: Simplify right side
    172,004.40x = 21,525,722,843.94
  5. Step 5: Solve for x
    x = 21,525,722,843.94/172,004.40
  6. Step 6: Final answer
    x = 125,146.35

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1.5x scale

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.