Home / 100,222.95-138,309.91-57,201.58

Finding the Fourth Proportional to 100,222.95, 138,309.91 and 57,201.58

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Solution

The fourth proportional to 100,222.95, 138,309.91 and 57,201.58 is: 78,939.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,222.95 : 138,309.91 = 57,201.58 : x
  2. Step 2: Convert to fraction form
    100,222.95/138,309.91 = 57,201.58/x
  3. Step 3: Cross multiply
    100,222.95x = 138,309.91 × 57,201.58
  4. Step 4: Simplify right side
    100,222.95x = 7,911,545,381.66
  5. Step 5: Solve for x
    x = 7,911,545,381.66/100,222.95
  6. Step 6: Final answer
    x = 78,939.46

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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.