Home / 100,431.52-138,590.82-55,108.48

Finding the Fourth Proportional to 100,431.52, 138,590.82 and 55,108.48

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Solution

The fourth proportional to 100,431.52, 138,590.82 and 55,108.48 is: 76,047.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,431.52 : 138,590.82 = 55,108.48 : x
  2. Step 2: Convert to fraction form
    100,431.52/138,590.82 = 55,108.48/x
  3. Step 3: Cross multiply
    100,431.52x = 138,590.82 × 55,108.48
  4. Step 4: Simplify right side
    100,431.52x = 7,637,529,432.15
  5. Step 5: Solve for x
    x = 7,637,529,432.15/100,431.52
  6. Step 6: Final answer
    x = 76,047.14

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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.