Home / 85,811.28-128,749.32-35,925

Finding the Fourth Proportional to 85,811.28, 128,749.32 and 35,925

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Solution

The fourth proportional to 85,811.28, 128,749.32 and 35,925 is: 53,901.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,811.28 : 128,749.32 = 35,925 : x
  2. Step 2: Convert to fraction form
    85,811.28/128,749.32 = 35,925/x
  3. Step 3: Cross multiply
    85,811.28x = 128,749.32 × 35,925
  4. Step 4: Simplify right side
    85,811.28x = 4,625,319,321
  5. Step 5: Solve for x
    x = 4,625,319,321/85,811.28
  6. Step 6: Final answer
    x = 53,901.06

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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.