Home / 100,921.25-139,271.33-56,209.25

Finding the Fourth Proportional to 100,921.25, 139,271.33 and 56,209.25

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Solution

The fourth proportional to 100,921.25, 139,271.33 and 56,209.25 is: 77,568.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,921.25 : 139,271.33 = 56,209.25 : x
  2. Step 2: Convert to fraction form
    100,921.25/139,271.33 = 56,209.25/x
  3. Step 3: Cross multiply
    100,921.25x = 139,271.33 × 56,209.25
  4. Step 4: Simplify right side
    100,921.25x = 7,828,337,005.80
  5. Step 5: Solve for x
    x = 7,828,337,005.80/100,921.25
  6. Step 6: Final answer
    x = 77,568.77

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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.