Home / 100,215.89-138,309.59-57,775.94

Finding the Fourth Proportional to 100,215.89, 138,309.59 and 57,775.94

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Solution

The fourth proportional to 100,215.89, 138,309.59 and 57,775.94 is: 79,737.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,215.89 : 138,309.59 = 57,775.94 : x
  2. Step 2: Convert to fraction form
    100,215.89/138,309.59 = 57,775.94/x
  3. Step 3: Cross multiply
    100,215.89x = 138,309.59 × 57,775.94
  4. Step 4: Simplify right side
    100,215.89x = 7,990,966,573.26
  5. Step 5: Solve for x
    x = 7,990,966,573.26/100,215.89
  6. Step 6: Final answer
    x = 79,737.52

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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.