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Finding the Fourth Proportional to 128,772.15, 192,994.20 and 93,670.80

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Solution

The fourth proportional to 128,772.15, 192,994.20 and 93,670.80 is: 140,386.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,772.15 : 192,994.20 = 93,670.80 : x
  2. Step 2: Convert to fraction form
    128,772.15/192,994.20 = 93,670.80/x
  3. Step 3: Cross multiply
    128,772.15x = 192,994.20 × 93,670.80
  4. Step 4: Simplify right side
    128,772.15x = 18,077,921,109.36
  5. Step 5: Solve for x
    x = 18,077,921,109.36/128,772.15
  6. Step 6: Final answer
    x = 140,386.89

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1.5x scale

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.