Home / 82,612.20-123,918.36-78,405.08

Finding the Fourth Proportional to 82,612.20, 123,918.36 and 78,405.08

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Solution

The fourth proportional to 82,612.20, 123,918.36 and 78,405.08 is: 117,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,612.20 : 123,918.36 = 78,405.08 : x
  2. Step 2: Convert to fraction form
    82,612.20/123,918.36 = 78,405.08/x
  3. Step 3: Cross multiply
    82,612.20x = 123,918.36 × 78,405.08
  4. Step 4: Simplify right side
    82,612.20x = 9,715,828,929.27
  5. Step 5: Solve for x
    x = 9,715,828,929.27/82,612.20
  6. Step 6: Final answer
    x = 117,607.68

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1.5x scale

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.