Home / 137,140.20-205,710.30-84,378.60

Finding the Fourth Proportional to 137,140.20, 205,710.30 and 84,378.60

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Solution

The fourth proportional to 137,140.20, 205,710.30 and 84,378.60 is: 126,567.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,140.20 : 205,710.30 = 84,378.60 : x
  2. Step 2: Convert to fraction form
    137,140.20/205,710.30 = 84,378.60/x
  3. Step 3: Cross multiply
    137,140.20x = 205,710.30 × 84,378.60
  4. Step 4: Simplify right side
    137,140.20x = 17,357,547,119.58
  5. Step 5: Solve for x
    x = 17,357,547,119.58/137,140.20
  6. Step 6: Final answer
    x = 126,567.90

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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.