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Finding the Fourth Proportional to 78,293.94, 117,440.89 and 28,373.95

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Solution

The fourth proportional to 78,293.94, 117,440.89 and 28,373.95 is: 42,560.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,293.94 : 117,440.89 = 28,373.95 : x
  2. Step 2: Convert to fraction form
    78,293.94/117,440.89 = 28,373.95/x
  3. Step 3: Cross multiply
    78,293.94x = 117,440.89 × 28,373.95
  4. Step 4: Simplify right side
    78,293.94x = 3,332,261,356.08
  5. Step 5: Solve for x
    x = 3,332,261,356.08/78,293.94
  6. Step 6: Final answer
    x = 42,560.91

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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.