Home / 100,878.12-139,206.87-58,450.32

Finding the Fourth Proportional to 100,878.12, 139,206.87 and 58,450.32

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Solution

The fourth proportional to 100,878.12, 139,206.87 and 58,450.32 is: 80,658.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,878.12 : 139,206.87 = 58,450.32 : x
  2. Step 2: Convert to fraction form
    100,878.12/139,206.87 = 58,450.32/x
  3. Step 3: Cross multiply
    100,878.12x = 139,206.87 × 58,450.32
  4. Step 4: Simplify right side
    100,878.12x = 8,136,686,097.70
  5. Step 5: Solve for x
    x = 8,136,686,097.70/100,878.12
  6. Step 6: Final answer
    x = 80,658.58

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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.