Home / 100,043.16-138,040.45-57,021.83

Finding the Fourth Proportional to 100,043.16, 138,040.45 and 57,021.83

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Solution

The fourth proportional to 100,043.16, 138,040.45 and 57,021.83 is: 78,679.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,043.16 : 138,040.45 = 57,021.83 : x
  2. Step 2: Convert to fraction form
    100,043.16/138,040.45 = 57,021.83/x
  3. Step 3: Cross multiply
    100,043.16x = 138,040.45 × 57,021.83
  4. Step 4: Simplify right side
    100,043.16x = 7,871,319,073.02
  5. Step 5: Solve for x
    x = 7,871,319,073.02/100,043.16
  6. Step 6: Final answer
    x = 78,679.23

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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.