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Finding the Fourth Proportional to 187,805.28, 259,173.28 and 102,920.48

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Solution

The fourth proportional to 187,805.28, 259,173.28 and 102,920.48 is: 142,031.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,805.28 : 259,173.28 = 102,920.48 : x
  2. Step 2: Convert to fraction form
    187,805.28/259,173.28 = 102,920.48/x
  3. Step 3: Cross multiply
    187,805.28x = 259,173.28 × 102,920.48
  4. Step 4: Simplify right side
    187,805.28x = 26,674,238,380.77
  5. Step 5: Solve for x
    x = 26,674,238,380.77/187,805.28
  6. Step 6: Final answer
    x = 142,031.35

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1.5x scale

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.