Home / 100,856.34-139,180.68-58,413.96

Finding the Fourth Proportional to 100,856.34, 139,180.68 and 58,413.96

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Solution

The fourth proportional to 100,856.34, 139,180.68 and 58,413.96 is: 80,610.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,856.34 : 139,180.68 = 58,413.96 : x
  2. Step 2: Convert to fraction form
    100,856.34/139,180.68 = 58,413.96/x
  3. Step 3: Cross multiply
    100,856.34x = 139,180.68 × 58,413.96
  4. Step 4: Simplify right side
    100,856.34x = 8,130,094,674.29
  5. Step 5: Solve for x
    x = 8,130,094,674.29/100,856.34
  6. Step 6: Final answer
    x = 80,610.65

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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.