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Finding the Fourth Proportional to 128,815.52, 177,683.60 and 93,058.08

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Solution

The fourth proportional to 128,815.52, 177,683.60 and 93,058.08 is: 128,361.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.52 : 177,683.60 = 93,058.08 : x
  2. Step 2: Convert to fraction form
    128,815.52/177,683.60 = 93,058.08/x
  3. Step 3: Cross multiply
    128,815.52x = 177,683.60 × 93,058.08
  4. Step 4: Simplify right side
    128,815.52x = 16,534,894,663.49
  5. Step 5: Solve for x
    x = 16,534,894,663.49/128,815.52
  6. Step 6: Final answer
    x = 128,361.04

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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.