Home / 100,815.93-139,124.85-55,492.92

Finding the Fourth Proportional to 100,815.93, 139,124.85 and 55,492.92

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Solution

The fourth proportional to 100,815.93, 139,124.85 and 55,492.92 is: 76,579.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,815.93 : 139,124.85 = 55,492.92 : x
  2. Step 2: Convert to fraction form
    100,815.93/139,124.85 = 55,492.92/x
  3. Step 3: Cross multiply
    100,815.93x = 139,124.85 × 55,492.92
  4. Step 4: Simplify right side
    100,815.93x = 7,720,444,171.06
  5. Step 5: Solve for x
    x = 7,720,444,171.06/100,815.93
  6. Step 6: Final answer
    x = 76,579.61

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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.