Home / 85,908.83-128,811.47-38,515.35

Finding the Fourth Proportional to 85,908.83, 128,811.47 and 38,515.35

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Solution

The fourth proportional to 85,908.83, 128,811.47 and 38,515.35 is: 57,749.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,908.83 : 128,811.47 = 38,515.35 : x
  2. Step 2: Convert to fraction form
    85,908.83/128,811.47 = 38,515.35/x
  3. Step 3: Cross multiply
    85,908.83x = 128,811.47 × 38,515.35
  4. Step 4: Simplify right side
    85,908.83x = 4,961,218,851.06
  5. Step 5: Solve for x
    x = 4,961,218,851.06/85,908.83
  6. Step 6: Final answer
    x = 57,749.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.