Home / 101,128.04-139,546.16-58,678.36

Finding the Fourth Proportional to 101,128.04, 139,546.16 and 58,678.36

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Solution

The fourth proportional to 101,128.04, 139,546.16 and 58,678.36 is: 80,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,128.04 : 139,546.16 = 58,678.36 : x
  2. Step 2: Convert to fraction form
    101,128.04/139,546.16 = 58,678.36/x
  3. Step 3: Cross multiply
    101,128.04x = 139,546.16 × 58,678.36
  4. Step 4: Simplify right side
    101,128.04x = 8,188,339,813.10
  5. Step 5: Solve for x
    x = 8,188,339,813.10/101,128.04
  6. Step 6: Final answer
    x = 80,970.02

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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.