Home / 115,337.66-159,157.32-75,128.45

Finding the Fourth Proportional to 115,337.66, 159,157.32 and 75,128.45

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Solution

The fourth proportional to 115,337.66, 159,157.32 and 75,128.45 is: 103,671.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,337.66 : 159,157.32 = 75,128.45 : x
  2. Step 2: Convert to fraction form
    115,337.66/159,157.32 = 75,128.45/x
  3. Step 3: Cross multiply
    115,337.66x = 159,157.32 × 75,128.45
  4. Step 4: Simplify right side
    115,337.66x = 11,957,242,757.75
  5. Step 5: Solve for x
    x = 11,957,242,757.75/115,337.66
  6. Step 6: Final answer
    x = 103,671.63

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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.