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Finding the Fourth Proportional to 187,721, 259,054.98 and 112,269.50

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Solution

The fourth proportional to 187,721, 259,054.98 and 112,269.50 is: 154,931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,721 : 259,054.98 = 112,269.50 : x
  2. Step 2: Convert to fraction form
    187,721/259,054.98 = 112,269.50/x
  3. Step 3: Cross multiply
    187,721x = 259,054.98 × 112,269.50
  4. Step 4: Simplify right side
    187,721x = 29,083,973,077.11
  5. Step 5: Solve for x
    x = 29,083,973,077.11/187,721
  6. Step 6: Final answer
    x = 154,931.91

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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.