Home / 78,397.08-108,128.36-54,238.24

Finding the Fourth Proportional to 78,397.08, 108,128.36 and 54,238.24

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Solution

The fourth proportional to 78,397.08, 108,128.36 and 54,238.24 is: 74,807.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,397.08 : 108,128.36 = 54,238.24 : x
  2. Step 2: Convert to fraction form
    78,397.08/108,128.36 = 54,238.24/x
  3. Step 3: Cross multiply
    78,397.08x = 108,128.36 × 54,238.24
  4. Step 4: Simplify right side
    78,397.08x = 5,864,691,940.49
  5. Step 5: Solve for x
    x = 5,864,691,940.49/78,397.08
  6. Step 6: Final answer
    x = 74,807.53

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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.