Home / 82,391.40-123,587.10-78,892.20

Finding the Fourth Proportional to 82,391.40, 123,587.10 and 78,892.20

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Solution

The fourth proportional to 82,391.40, 123,587.10 and 78,892.20 is: 118,338.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,391.40 : 123,587.10 = 78,892.20 : x
  2. Step 2: Convert to fraction form
    82,391.40/123,587.10 = 78,892.20/x
  3. Step 3: Cross multiply
    82,391.40x = 123,587.10 × 78,892.20
  4. Step 4: Simplify right side
    82,391.40x = 9,750,058,210.62
  5. Step 5: Solve for x
    x = 9,750,058,210.62/82,391.40
  6. Step 6: Final answer
    x = 118,338.30

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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.