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Finding the Fourth Proportional to 86,643.09, 129,938.18 and 36,722.25

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Solution

The fourth proportional to 86,643.09, 129,938.18 and 36,722.25 is: 55,072.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,643.09 : 129,938.18 = 36,722.25 : x
  2. Step 2: Convert to fraction form
    86,643.09/129,938.18 = 36,722.25/x
  3. Step 3: Cross multiply
    86,643.09x = 129,938.18 × 36,722.25
  4. Step 4: Simplify right side
    86,643.09x = 4,771,622,146.89
  5. Step 5: Solve for x
    x = 4,771,622,146.89/86,643.09
  6. Step 6: Final answer
    x = 55,072.16

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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.