Home / 100,914.08-139,255.32-58,465.28

Finding the Fourth Proportional to 100,914.08, 139,255.32 and 58,465.28

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Solution

The fourth proportional to 100,914.08, 139,255.32 and 58,465.28 is: 80,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,914.08 : 139,255.32 = 58,465.28 : x
  2. Step 2: Convert to fraction form
    100,914.08/139,255.32 = 58,465.28/x
  3. Step 3: Cross multiply
    100,914.08x = 139,255.32 × 58,465.28
  4. Step 4: Simplify right side
    100,914.08x = 8,141,601,275.29
  5. Step 5: Solve for x
    x = 8,141,601,275.29/100,914.08
  6. Step 6: Final answer
    x = 80,678.55

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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.