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Finding the Fourth Proportional to 187,615.80, 258,643.08 and 115,955.28

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Solution

The fourth proportional to 187,615.80, 258,643.08 and 115,955.28 is: 159,853.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,615.80 : 258,643.08 = 115,955.28 : x
  2. Step 2: Convert to fraction form
    187,615.80/258,643.08 = 115,955.28/x
  3. Step 3: Cross multiply
    187,615.80x = 258,643.08 × 115,955.28
  4. Step 4: Simplify right side
    187,615.80x = 29,991,030,761.46
  5. Step 5: Solve for x
    x = 29,991,030,761.46/187,615.80
  6. Step 6: Final answer
    x = 159,853.44

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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.