Home / 100,400.24-138,551.02-57,379.24

Finding the Fourth Proportional to 100,400.24, 138,551.02 and 57,379.24

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Solution

The fourth proportional to 100,400.24, 138,551.02 and 57,379.24 is: 79,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,400.24 : 138,551.02 = 57,379.24 : x
  2. Step 2: Convert to fraction form
    100,400.24/138,551.02 = 57,379.24/x
  3. Step 3: Cross multiply
    100,400.24x = 138,551.02 × 57,379.24
  4. Step 4: Simplify right side
    100,400.24x = 7,949,952,228.82
  5. Step 5: Solve for x
    x = 7,949,952,228.82/100,400.24
  6. Step 6: Final answer
    x = 79,182.60

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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.