Home / 78,099.84-117,155.52-28,209.60

Finding the Fourth Proportional to 78,099.84, 117,155.52 and 28,209.60

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Solution

The fourth proportional to 78,099.84, 117,155.52 and 28,209.60 is: 42,316.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,099.84 : 117,155.52 = 28,209.60 : x
  2. Step 2: Convert to fraction form
    78,099.84/117,155.52 = 28,209.60/x
  3. Step 3: Cross multiply
    78,099.84x = 117,155.52 × 28,209.60
  4. Step 4: Simplify right side
    78,099.84x = 3,304,910,356.99
  5. Step 5: Solve for x
    x = 3,304,910,356.99/78,099.84
  6. Step 6: Final answer
    x = 42,316.48

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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.