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Finding the Fourth Proportional to 171,430.51, 236,574.79 and 99,859.72

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Solution

The fourth proportional to 171,430.51, 236,574.79 and 99,859.72 is: 137,806.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,430.51 : 236,574.79 = 99,859.72 : x
  2. Step 2: Convert to fraction form
    171,430.51/236,574.79 = 99,859.72/x
  3. Step 3: Cross multiply
    171,430.51x = 236,574.79 × 99,859.72
  4. Step 4: Simplify right side
    171,430.51x = 23,624,292,288.46
  5. Step 5: Solve for x
    x = 23,624,292,288.46/171,430.51
  6. Step 6: Final answer
    x = 137,806.81

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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.