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Finding the Fourth Proportional to 128,583.52, 177,443.52 and 71,994.88

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Solution

The fourth proportional to 128,583.52, 177,443.52 and 71,994.88 is: 99,351.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,583.52 : 177,443.52 = 71,994.88 : x
  2. Step 2: Convert to fraction form
    128,583.52/177,443.52 = 71,994.88/x
  3. Step 3: Cross multiply
    128,583.52x = 177,443.52 × 71,994.88
  4. Step 4: Simplify right side
    128,583.52x = 12,775,024,929.18
  5. Step 5: Solve for x
    x = 12,775,024,929.18/128,583.52
  6. Step 6: Final answer
    x = 99,351.96

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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.