Home / 86,567.40-129,851.10-81,646.65

Finding the Fourth Proportional to 86,567.40, 129,851.10 and 81,646.65

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Solution

The fourth proportional to 86,567.40, 129,851.10 and 81,646.65 is: 122,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,567.40 : 129,851.10 = 81,646.65 : x
  2. Step 2: Convert to fraction form
    86,567.40/129,851.10 = 81,646.65/x
  3. Step 3: Cross multiply
    86,567.40x = 129,851.10 × 81,646.65
  4. Step 4: Simplify right side
    86,567.40x = 10,601,907,313.82
  5. Step 5: Solve for x
    x = 10,601,907,313.82/86,567.40
  6. Step 6: Final answer
    x = 122,469.98

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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.