Home / 85,534.11-128,308.34-31,513.50

Finding the Fourth Proportional to 85,534.11, 128,308.34 and 31,513.50

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Solution

The fourth proportional to 85,534.11, 128,308.34 and 31,513.50 is: 47,272.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,534.11 : 128,308.34 = 31,513.50 : x
  2. Step 2: Convert to fraction form
    85,534.11/128,308.34 = 31,513.50/x
  3. Step 3: Cross multiply
    85,534.11x = 128,308.34 × 31,513.50
  4. Step 4: Simplify right side
    85,534.11x = 4,043,444,951.37
  5. Step 5: Solve for x
    x = 4,043,444,951.37/85,534.11
  6. Step 6: Final answer
    x = 47,272.89

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1.5x scale

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.