Home / 100,734.08-139,016.40-55,417.28

Finding the Fourth Proportional to 100,734.08, 139,016.40 and 55,417.28

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Solution

The fourth proportional to 100,734.08, 139,016.40 and 55,417.28 is: 76,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,734.08 : 139,016.40 = 55,417.28 : x
  2. Step 2: Convert to fraction form
    100,734.08/139,016.40 = 55,417.28/x
  3. Step 3: Cross multiply
    100,734.08x = 139,016.40 × 55,417.28
  4. Step 4: Simplify right side
    100,734.08x = 7,703,910,763.39
  5. Step 5: Solve for x
    x = 7,703,910,763.39/100,734.08
  6. Step 6: Final answer
    x = 76,477.70

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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.