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Finding the Fourth Proportional to 53,458.80, 80,207.40 and 51,538.80

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Solution

The fourth proportional to 53,458.80, 80,207.40 and 51,538.80 is: 77,326.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,458.80 : 80,207.40 = 51,538.80 : x
  2. Step 2: Convert to fraction form
    53,458.80/80,207.40 = 51,538.80/x
  3. Step 3: Cross multiply
    53,458.80x = 80,207.40 × 51,538.80
  4. Step 4: Simplify right side
    53,458.80x = 4,133,793,147.12
  5. Step 5: Solve for x
    x = 4,133,793,147.12/53,458.80
  6. Step 6: Final answer
    x = 77,326.71

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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.