Home / 100,342.08-138,478.08-57,335.04

Finding the Fourth Proportional to 100,342.08, 138,478.08 and 57,335.04

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Solution

The fourth proportional to 100,342.08, 138,478.08 and 57,335.04 is: 79,125.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,342.08 : 138,478.08 = 57,335.04 : x
  2. Step 2: Convert to fraction form
    100,342.08/138,478.08 = 57,335.04/x
  3. Step 3: Cross multiply
    100,342.08x = 138,478.08 × 57,335.04
  4. Step 4: Simplify right side
    100,342.08x = 7,939,646,255.92
  5. Step 5: Solve for x
    x = 7,939,646,255.92/100,342.08
  6. Step 6: Final answer
    x = 79,125.79

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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.