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Finding the Fourth Proportional to 101,386.53, 139,866.92 and 65,588.07

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Solution

The fourth proportional to 101,386.53, 139,866.92 and 65,588.07 is: 90,481.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,386.53 : 139,866.92 = 65,588.07 : x
  2. Step 2: Convert to fraction form
    101,386.53/139,866.92 = 65,588.07/x
  3. Step 3: Cross multiply
    101,386.53x = 139,866.92 × 65,588.07
  4. Step 4: Simplify right side
    101,386.53x = 9,173,601,011.70
  5. Step 5: Solve for x
    x = 9,173,601,011.70/101,386.53
  6. Step 6: Final answer
    x = 90,481.46

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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.