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Finding the Fourth Proportional to 128,970.17, 192,407.97 and 121,994.81

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Solution

The fourth proportional to 128,970.17, 192,407.97 and 121,994.81 is: 182,001.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,970.17 : 192,407.97 = 121,994.81 : x
  2. Step 2: Convert to fraction form
    128,970.17/192,407.97 = 121,994.81/x
  3. Step 3: Cross multiply
    128,970.17x = 192,407.97 × 121,994.81
  4. Step 4: Simplify right side
    128,970.17x = 23,472,772,780.60
  5. Step 5: Solve for x
    x = 23,472,772,780.60/128,970.17
  6. Step 6: Final answer
    x = 182,001.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.