Home / 139,346.16-192,294.96-78,915.84

Finding the Fourth Proportional to 139,346.16, 192,294.96 and 78,915.84

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Solution

The fourth proportional to 139,346.16, 192,294.96 and 78,915.84 is: 108,902.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,346.16 : 192,294.96 = 78,915.84 : x
  2. Step 2: Convert to fraction form
    139,346.16/192,294.96 = 78,915.84/x
  3. Step 3: Cross multiply
    139,346.16x = 192,294.96 × 78,915.84
  4. Step 4: Simplify right side
    139,346.16x = 15,175,118,296.17
  5. Step 5: Solve for x
    x = 15,175,118,296.17/139,346.16
  6. Step 6: Final answer
    x = 108,902.31

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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.