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Finding the Fourth Proportional to 72,087.95, 108,131.88 and 52,491.17

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Solution

The fourth proportional to 72,087.95, 108,131.88 and 52,491.17 is: 78,736.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,087.95 : 108,131.88 = 52,491.17 : x
  2. Step 2: Convert to fraction form
    72,087.95/108,131.88 = 52,491.17/x
  3. Step 3: Cross multiply
    72,087.95x = 108,131.88 × 52,491.17
  4. Step 4: Simplify right side
    72,087.95x = 5,675,968,895.50
  5. Step 5: Solve for x
    x = 5,675,968,895.50/72,087.95
  6. Step 6: Final answer
    x = 78,736.72

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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.