Home / 78,384.20-117,527.70-45,087.80

Finding the Fourth Proportional to 78,384.20, 117,527.70 and 45,087.80

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Solution

The fourth proportional to 78,384.20, 117,527.70 and 45,087.80 is: 67,603.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,384.20 : 117,527.70 = 45,087.80 : x
  2. Step 2: Convert to fraction form
    78,384.20/117,527.70 = 45,087.80/x
  3. Step 3: Cross multiply
    78,384.20x = 117,527.70 × 45,087.80
  4. Step 4: Simplify right side
    78,384.20x = 5,299,065,432.06
  5. Step 5: Solve for x
    x = 5,299,065,432.06/78,384.20
  6. Step 6: Final answer
    x = 67,603.74

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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.