Home / 100,879.20-139,063.92-64,575.32

Finding the Fourth Proportional to 100,879.20, 139,063.92 and 64,575.32

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Solution

The fourth proportional to 100,879.20, 139,063.92 and 64,575.32 is: 89,018.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,879.20 : 139,063.92 = 64,575.32 : x
  2. Step 2: Convert to fraction form
    100,879.20/139,063.92 = 64,575.32/x
  3. Step 3: Cross multiply
    100,879.20x = 139,063.92 × 64,575.32
  4. Step 4: Simplify right side
    100,879.20x = 8,980,097,134.45
  5. Step 5: Solve for x
    x = 8,980,097,134.45/100,879.20
  6. Step 6: Final answer
    x = 89,018.32

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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.