Home / 82,310.40-123,465.60-78,854.40

Finding the Fourth Proportional to 82,310.40, 123,465.60 and 78,854.40

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Solution

The fourth proportional to 82,310.40, 123,465.60 and 78,854.40 is: 118,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,310.40 : 123,465.60 = 78,854.40 : x
  2. Step 2: Convert to fraction form
    82,310.40/123,465.60 = 78,854.40/x
  3. Step 3: Cross multiply
    82,310.40x = 123,465.60 × 78,854.40
  4. Step 4: Simplify right side
    82,310.40x = 9,735,805,808.64
  5. Step 5: Solve for x
    x = 9,735,805,808.64/82,310.40
  6. Step 6: Final answer
    x = 118,281.60

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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.