Home / 85,645.22-128,614.84-52,559.55

Finding the Fourth Proportional to 85,645.22, 128,614.84 and 52,559.55

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Solution

The fourth proportional to 85,645.22, 128,614.84 and 52,559.55 is: 78,929.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,645.22 : 128,614.84 = 52,559.55 : x
  2. Step 2: Convert to fraction form
    85,645.22/128,614.84 = 52,559.55/x
  3. Step 3: Cross multiply
    85,645.22x = 128,614.84 × 52,559.55
  4. Step 4: Simplify right side
    85,645.22x = 6,759,937,982.32
  5. Step 5: Solve for x
    x = 6,759,937,982.32/85,645.22
  6. Step 6: Final answer
    x = 78,929.55

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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.