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Finding the Fourth Proportional to 139,762.40, 192,915.63 and 79,373.25

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Solution

The fourth proportional to 139,762.40, 192,915.63 and 79,373.25 is: 109,559.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,762.40 : 192,915.63 = 79,373.25 : x
  2. Step 2: Convert to fraction form
    139,762.40/192,915.63 = 79,373.25/x
  3. Step 3: Cross multiply
    139,762.40x = 192,915.63 × 79,373.25
  4. Step 4: Simplify right side
    139,762.40x = 15,312,340,528.90
  5. Step 5: Solve for x
    x = 15,312,340,528.90/139,762.40
  6. Step 6: Final answer
    x = 109,559.80

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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.