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Finding the Fourth Proportional to 78,484.40, 117,624.20 and 36,359.60

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Solution

The fourth proportional to 78,484.40, 117,624.20 and 36,359.60 is: 54,491.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,484.40 : 117,624.20 = 36,359.60 : x
  2. Step 2: Convert to fraction form
    78,484.40/117,624.20 = 36,359.60/x
  3. Step 3: Cross multiply
    78,484.40x = 117,624.20 × 36,359.60
  4. Step 4: Simplify right side
    78,484.40x = 4,276,768,862.32
  5. Step 5: Solve for x
    x = 4,276,768,862.32/78,484.40
  6. Step 6: Final answer
    x = 54,491.96

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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.