Home / 79,689.04-109,925-49,829.20

Finding the Fourth Proportional to 79,689.04, 109,925 and 49,829.20

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Solution

The fourth proportional to 79,689.04, 109,925 and 49,829.20 is: 68,735.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.04 : 109,925 = 49,829.20 : x
  2. Step 2: Convert to fraction form
    79,689.04/109,925 = 49,829.20/x
  3. Step 3: Cross multiply
    79,689.04x = 109,925 × 49,829.20
  4. Step 4: Simplify right side
    79,689.04x = 5,477,474,810
  5. Step 5: Solve for x
    x = 5,477,474,810/79,689.04
  6. Step 6: Final answer
    x = 68,735.61

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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.