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Finding the Fourth Proportional to 86,489.84, 129,733.98 and 27,325.50

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Solution

The fourth proportional to 86,489.84, 129,733.98 and 27,325.50 is: 40,988.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,489.84 : 129,733.98 = 27,325.50 : x
  2. Step 2: Convert to fraction form
    86,489.84/129,733.98 = 27,325.50/x
  3. Step 3: Cross multiply
    86,489.84x = 129,733.98 × 27,325.50
  4. Step 4: Simplify right side
    86,489.84x = 3,545,045,870.49
  5. Step 5: Solve for x
    x = 3,545,045,870.49/86,489.84
  6. Step 6: Final answer
    x = 40,988.01

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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.