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Finding the Fourth Proportional to 78,855.30, 118,282.95 and 74,967.30

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Solution

The fourth proportional to 78,855.30, 118,282.95 and 74,967.30 is: 112,450.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.30 : 118,282.95 = 74,967.30 : x
  2. Step 2: Convert to fraction form
    78,855.30/118,282.95 = 74,967.30/x
  3. Step 3: Cross multiply
    78,855.30x = 118,282.95 × 74,967.30
  4. Step 4: Simplify right side
    78,855.30x = 8,867,353,397.54
  5. Step 5: Solve for x
    x = 8,867,353,397.54/78,855.30
  6. Step 6: Final answer
    x = 112,450.95

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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.