Home / 78,117.28-117,176.09-28,232.60

Finding the Fourth Proportional to 78,117.28, 117,176.09 and 28,232.60

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Solution

The fourth proportional to 78,117.28, 117,176.09 and 28,232.60 is: 42,348.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,117.28 : 117,176.09 = 28,232.60 : x
  2. Step 2: Convert to fraction form
    78,117.28/117,176.09 = 28,232.60/x
  3. Step 3: Cross multiply
    78,117.28x = 117,176.09 × 28,232.60
  4. Step 4: Simplify right side
    78,117.28x = 3,308,184,951.49
  5. Step 5: Solve for x
    x = 3,308,184,951.49/78,117.28
  6. Step 6: Final answer
    x = 42,348.95

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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.