Home / 139,316.18-192,257.04-78,898.58

Finding the Fourth Proportional to 139,316.18, 192,257.04 and 78,898.58

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Solution

The fourth proportional to 139,316.18, 192,257.04 and 78,898.58 is: 108,880.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,316.18 : 192,257.04 = 78,898.58 : x
  2. Step 2: Convert to fraction form
    139,316.18/192,257.04 = 78,898.58/x
  3. Step 3: Cross multiply
    139,316.18x = 192,257.04 × 78,898.58
  4. Step 4: Simplify right side
    139,316.18x = 15,168,806,489.72
  5. Step 5: Solve for x
    x = 15,168,806,489.72/139,316.18
  6. Step 6: Final answer
    x = 108,880.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.