Home / 100,725.76-139,002.88-56,015.36

Finding the Fourth Proportional to 100,725.76, 139,002.88 and 56,015.36

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Solution

The fourth proportional to 100,725.76, 139,002.88 and 56,015.36 is: 77,301.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,725.76 : 139,002.88 = 56,015.36 : x
  2. Step 2: Convert to fraction form
    100,725.76/139,002.88 = 56,015.36/x
  3. Step 3: Cross multiply
    100,725.76x = 139,002.88 × 56,015.36
  4. Step 4: Simplify right side
    100,725.76x = 7,786,296,364.24
  5. Step 5: Solve for x
    x = 7,786,296,364.24/100,725.76
  6. Step 6: Final answer
    x = 77,301.94

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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.