Home / 78,620.13-108,496.26-42,810.03

Finding the Fourth Proportional to 78,620.13, 108,496.26 and 42,810.03

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Solution

The fourth proportional to 78,620.13, 108,496.26 and 42,810.03 is: 59,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,620.13 : 108,496.26 = 42,810.03 : x
  2. Step 2: Convert to fraction form
    78,620.13/108,496.26 = 42,810.03/x
  3. Step 3: Cross multiply
    78,620.13x = 108,496.26 × 42,810.03
  4. Step 4: Simplify right side
    78,620.13x = 4,644,728,145.49
  5. Step 5: Solve for x
    x = 4,644,728,145.49/78,620.13
  6. Step 6: Final answer
    x = 59,078.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.