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Finding the Fourth Proportional to 93,490.56, 128,831.58 and 66,585.60

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Solution

The fourth proportional to 93,490.56, 128,831.58 and 66,585.60 is: 91,756.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,490.56 : 128,831.58 = 66,585.60 : x
  2. Step 2: Convert to fraction form
    93,490.56/128,831.58 = 66,585.60/x
  3. Step 3: Cross multiply
    93,490.56x = 128,831.58 × 66,585.60
  4. Step 4: Simplify right side
    93,490.56x = 8,578,328,053.25
  5. Step 5: Solve for x
    x = 8,578,328,053.25/93,490.56
  6. Step 6: Final answer
    x = 91,756.09

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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.