Home / 100,985.32-139,358.96-55,663.38

Finding the Fourth Proportional to 100,985.32, 139,358.96 and 55,663.38

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Solution

The fourth proportional to 100,985.32, 139,358.96 and 55,663.38 is: 76,815.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,985.32 : 139,358.96 = 55,663.38 : x
  2. Step 2: Convert to fraction form
    100,985.32/139,358.96 = 55,663.38/x
  3. Step 3: Cross multiply
    100,985.32x = 139,358.96 × 55,663.38
  4. Step 4: Simplify right side
    100,985.32x = 7,757,190,746.88
  5. Step 5: Solve for x
    x = 7,757,190,746.88/100,985.32
  6. Step 6: Final answer
    x = 76,815.03

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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.