Home / 89,153.12-123,043.92-55,172.55

Finding the Fourth Proportional to 89,153.12, 123,043.92 and 55,172.55

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Solution

The fourth proportional to 89,153.12, 123,043.92 and 55,172.55 is: 76,145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,153.12 : 123,043.92 = 55,172.55 : x
  2. Step 2: Convert to fraction form
    89,153.12/123,043.92 = 55,172.55/x
  3. Step 3: Cross multiply
    89,153.12x = 123,043.92 × 55,172.55
  4. Step 4: Simplify right side
    89,153.12x = 6,788,646,386.33
  5. Step 5: Solve for x
    x = 6,788,646,386.33/89,153.12
  6. Step 6: Final answer
    x = 76,145.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.