Home / 86,554.09-129,489.50-65,554.64

Finding the Fourth Proportional to 86,554.09, 129,489.50 and 65,554.64

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Solution

The fourth proportional to 86,554.09, 129,489.50 and 65,554.64 is: 98,073.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,554.09 : 129,489.50 = 65,554.64 : x
  2. Step 2: Convert to fraction form
    86,554.09/129,489.50 = 65,554.64/x
  3. Step 3: Cross multiply
    86,554.09x = 129,489.50 × 65,554.64
  4. Step 4: Simplify right side
    86,554.09x = 8,488,637,072.72
  5. Step 5: Solve for x
    x = 8,488,637,072.72/86,554.09
  6. Step 6: Final answer
    x = 98,073.21

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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.