Home / 100,928.76-139,281.70-58,511.90

Finding the Fourth Proportional to 100,928.76, 139,281.70 and 58,511.90

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Solution

The fourth proportional to 100,928.76, 139,281.70 and 58,511.90 is: 80,746.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,928.76 : 139,281.70 = 58,511.90 : x
  2. Step 2: Convert to fraction form
    100,928.76/139,281.70 = 58,511.90/x
  3. Step 3: Cross multiply
    100,928.76x = 139,281.70 × 58,511.90
  4. Step 4: Simplify right side
    100,928.76x = 8,149,636,902.23
  5. Step 5: Solve for x
    x = 8,149,636,902.23/100,928.76
  6. Step 6: Final answer
    x = 80,746.43

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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.