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Finding the Fourth Proportional to 61,683.78, 85,123.54 and 33,389.40

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Solution

The fourth proportional to 61,683.78, 85,123.54 and 33,389.40 is: 46,077.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,683.78 : 85,123.54 = 33,389.40 : x
  2. Step 2: Convert to fraction form
    61,683.78/85,123.54 = 33,389.40/x
  3. Step 3: Cross multiply
    61,683.78x = 85,123.54 × 33,389.40
  4. Step 4: Simplify right side
    61,683.78x = 2,842,223,926.48
  5. Step 5: Solve for x
    x = 2,842,223,926.48/61,683.78
  6. Step 6: Final answer
    x = 46,077.33

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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.