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Finding the Fourth Proportional to 93,213.51, 128,480.97 and 65,954.40

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Solution

The fourth proportional to 93,213.51, 128,480.97 and 65,954.40 is: 90,908.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,213.51 : 128,480.97 = 65,954.40 : x
  2. Step 2: Convert to fraction form
    93,213.51/128,480.97 = 65,954.40/x
  3. Step 3: Cross multiply
    93,213.51x = 128,480.97 × 65,954.40
  4. Step 4: Simplify right side
    93,213.51x = 8,473,885,287.77
  5. Step 5: Solve for x
    x = 8,473,885,287.77/93,213.51
  6. Step 6: Final answer
    x = 90,908.34

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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.