Home / 86,165.06-129,247.63-39,385.13

Finding the Fourth Proportional to 86,165.06, 129,247.63 and 39,385.13

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Solution

The fourth proportional to 86,165.06, 129,247.63 and 39,385.13 is: 59,077.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,165.06 : 129,247.63 = 39,385.13 : x
  2. Step 2: Convert to fraction form
    86,165.06/129,247.63 = 39,385.13/x
  3. Step 3: Cross multiply
    86,165.06x = 129,247.63 × 39,385.13
  4. Step 4: Simplify right side
    86,165.06x = 5,090,433,965.04
  5. Step 5: Solve for x
    x = 5,090,433,965.04/86,165.06
  6. Step 6: Final answer
    x = 59,077.71

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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.