Home / 79,128.50-109,197.32-43,318.40

Finding the Fourth Proportional to 79,128.50, 109,197.32 and 43,318.40

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Solution

The fourth proportional to 79,128.50, 109,197.32 and 43,318.40 is: 59,779.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.50 : 109,197.32 = 43,318.40 : x
  2. Step 2: Convert to fraction form
    79,128.50/109,197.32 = 43,318.40/x
  3. Step 3: Cross multiply
    79,128.50x = 109,197.32 × 43,318.40
  4. Step 4: Simplify right side
    79,128.50x = 4,730,252,424.11
  5. Step 5: Solve for x
    x = 4,730,252,424.11/79,128.50
  6. Step 6: Final answer
    x = 59,779.38

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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.