Home / 79,139.04-118,829.16-69,138.36

Finding the Fourth Proportional to 79,139.04, 118,829.16 and 69,138.36

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Solution

The fourth proportional to 79,139.04, 118,829.16 and 69,138.36 is: 103,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,139.04 : 118,829.16 = 69,138.36 : x
  2. Step 2: Convert to fraction form
    79,139.04/118,829.16 = 69,138.36/x
  3. Step 3: Cross multiply
    79,139.04x = 118,829.16 × 69,138.36
  4. Step 4: Simplify right side
    79,139.04x = 8,215,653,242.58
  5. Step 5: Solve for x
    x = 8,215,653,242.58/79,139.04
  6. Step 6: Final answer
    x = 103,812.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.