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Finding the Fourth Proportional to 102,650.88, 153,625.76 and 86,029.68

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Solution

The fourth proportional to 102,650.88, 153,625.76 and 86,029.68 is: 128,750.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,650.88 : 153,625.76 = 86,029.68 : x
  2. Step 2: Convert to fraction form
    102,650.88/153,625.76 = 86,029.68/x
  3. Step 3: Cross multiply
    102,650.88x = 153,625.76 × 86,029.68
  4. Step 4: Simplify right side
    102,650.88x = 13,216,374,972.56
  5. Step 5: Solve for x
    x = 13,216,374,972.56/102,650.88
  6. Step 6: Final answer
    x = 128,750.72

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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.