Home / 100,813.81-139,123.56-55,496.35

Finding the Fourth Proportional to 100,813.81, 139,123.56 and 55,496.35

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Solution

The fourth proportional to 100,813.81, 139,123.56 and 55,496.35 is: 76,585.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,813.81 : 139,123.56 = 55,496.35 : x
  2. Step 2: Convert to fraction form
    100,813.81/139,123.56 = 55,496.35/x
  3. Step 3: Cross multiply
    100,813.81x = 139,123.56 × 55,496.35
  4. Step 4: Simplify right side
    100,813.81x = 7,720,849,779.01
  5. Step 5: Solve for x
    x = 7,720,849,779.01/100,813.81
  6. Step 6: Final answer
    x = 76,585.24

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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.