Home / 78,116.18-117,137.46-28,189.76

Finding the Fourth Proportional to 78,116.18, 117,137.46 and 28,189.76

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Solution

The fourth proportional to 78,116.18, 117,137.46 and 28,189.76 is: 42,271.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,116.18 : 117,137.46 = 28,189.76 : x
  2. Step 2: Convert to fraction form
    78,116.18/117,137.46 = 28,189.76/x
  3. Step 3: Cross multiply
    78,116.18x = 117,137.46 × 28,189.76
  4. Step 4: Simplify right side
    78,116.18x = 3,302,076,884.41
  5. Step 5: Solve for x
    x = 3,302,076,884.41/78,116.18
  6. Step 6: Final answer
    x = 42,271.36

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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.