Home / 86,637.28-129,676.96-69,808.16

Finding the Fourth Proportional to 86,637.28, 129,676.96 and 69,808.16

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Solution

The fourth proportional to 86,637.28, 129,676.96 and 69,808.16 is: 104,487.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,637.28 : 129,676.96 = 69,808.16 : x
  2. Step 2: Convert to fraction form
    86,637.28/129,676.96 = 69,808.16/x
  3. Step 3: Cross multiply
    86,637.28x = 129,676.96 × 69,808.16
  4. Step 4: Simplify right side
    86,637.28x = 9,052,509,971.99
  5. Step 5: Solve for x
    x = 9,052,509,971.99/86,637.28
  6. Step 6: Final answer
    x = 104,487.47

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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.