Home / 86,457.64-129,641.40-40,817.68

Finding the Fourth Proportional to 86,457.64, 129,641.40 and 40,817.68

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Solution

The fourth proportional to 86,457.64, 129,641.40 and 40,817.68 is: 61,205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,457.64 : 129,641.40 = 40,817.68 : x
  2. Step 2: Convert to fraction form
    86,457.64/129,641.40 = 40,817.68/x
  3. Step 3: Cross multiply
    86,457.64x = 129,641.40 × 40,817.68
  4. Step 4: Simplify right side
    86,457.64x = 5,291,661,179.95
  5. Step 5: Solve for x
    x = 5,291,661,179.95/86,457.64
  6. Step 6: Final answer
    x = 61,205.25

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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.