Home / 85,430.33-128,171.50-40,486.12

Finding the Fourth Proportional to 85,430.33, 128,171.50 and 40,486.12

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Solution

The fourth proportional to 85,430.33, 128,171.50 and 40,486.12 is: 60,741.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,430.33 : 128,171.50 = 40,486.12 : x
  2. Step 2: Convert to fraction form
    85,430.33/128,171.50 = 40,486.12/x
  3. Step 3: Cross multiply
    85,430.33x = 128,171.50 × 40,486.12
  4. Step 4: Simplify right side
    85,430.33x = 5,189,166,729.58
  5. Step 5: Solve for x
    x = 5,189,166,729.58/85,430.33
  6. Step 6: Final answer
    x = 60,741.50

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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.