Home / 100,822.52-139,143.66-55,509.32

Finding the Fourth Proportional to 100,822.52, 139,143.66 and 55,509.32

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Solution

The fourth proportional to 100,822.52, 139,143.66 and 55,509.32 is: 76,607.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,822.52 : 139,143.66 = 55,509.32 : x
  2. Step 2: Convert to fraction form
    100,822.52/139,143.66 = 55,509.32/x
  3. Step 3: Cross multiply
    100,822.52x = 139,143.66 × 55,509.32
  4. Step 4: Simplify right side
    100,822.52x = 7,723,769,948.91
  5. Step 5: Solve for x
    x = 7,723,769,948.91/100,822.52
  6. Step 6: Final answer
    x = 76,607.59

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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.