Home / 154,783.02-213,603-86,815.10

Finding the Fourth Proportional to 154,783.02, 213,603 and 86,815.10

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Solution

The fourth proportional to 154,783.02, 213,603 and 86,815.10 is: 119,806.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,783.02 : 213,603 = 86,815.10 : x
  2. Step 2: Convert to fraction form
    154,783.02/213,603 = 86,815.10/x
  3. Step 3: Cross multiply
    154,783.02x = 213,603 × 86,815.10
  4. Step 4: Simplify right side
    154,783.02x = 18,543,965,805.30
  5. Step 5: Solve for x
    x = 18,543,965,805.30/154,783.02
  6. Step 6: Final answer
    x = 119,806.20

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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.