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Finding the Fourth Proportional to 124,657.51, 187,054.31 and 72,169.51

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Solution

The fourth proportional to 124,657.51, 187,054.31 and 72,169.51 is: 108,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,657.51 : 187,054.31 = 72,169.51 : x
  2. Step 2: Convert to fraction form
    124,657.51/187,054.31 = 72,169.51/x
  3. Step 3: Cross multiply
    124,657.51x = 187,054.31 × 72,169.51
  4. Step 4: Simplify right side
    124,657.51x = 13,499,617,896.09
  5. Step 5: Solve for x
    x = 13,499,617,896.09/124,657.51
  6. Step 6: Final answer
    x = 108,293.66

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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.