Home / 86,328.12-129,491.87-38,887.68

Finding the Fourth Proportional to 86,328.12, 129,491.87 and 38,887.68

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Solution

The fourth proportional to 86,328.12, 129,491.87 and 38,887.68 is: 58,331.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,328.12 : 129,491.87 = 38,887.68 : x
  2. Step 2: Convert to fraction form
    86,328.12/129,491.87 = 38,887.68/x
  3. Step 3: Cross multiply
    86,328.12x = 129,491.87 × 38,887.68
  4. Step 4: Simplify right side
    86,328.12x = 5,035,638,403.16
  5. Step 5: Solve for x
    x = 5,035,638,403.16/86,328.12
  6. Step 6: Final answer
    x = 58,331.38

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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.