Home / 100,889.32-139,220.58-58,440.28

Finding the Fourth Proportional to 100,889.32, 139,220.58 and 58,440.28

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Solution

The fourth proportional to 100,889.32, 139,220.58 and 58,440.28 is: 80,643.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,889.32 : 139,220.58 = 58,440.28 : x
  2. Step 2: Convert to fraction form
    100,889.32/139,220.58 = 58,440.28/x
  3. Step 3: Cross multiply
    100,889.32x = 139,220.58 × 58,440.28
  4. Step 4: Simplify right side
    100,889.32x = 8,136,089,676.96
  5. Step 5: Solve for x
    x = 8,136,089,676.96/100,889.32
  6. Step 6: Final answer
    x = 80,643.72

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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.