Home / 51,638.80-77,458.20-31,939.60

Finding the Fourth Proportional to 51,638.80, 77,458.20 and 31,939.60

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Solution

The fourth proportional to 51,638.80, 77,458.20 and 31,939.60 is: 47,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,638.80 : 77,458.20 = 31,939.60 : x
  2. Step 2: Convert to fraction form
    51,638.80/77,458.20 = 31,939.60/x
  3. Step 3: Cross multiply
    51,638.80x = 77,458.20 × 31,939.60
  4. Step 4: Simplify right side
    51,638.80x = 2,473,983,924.72
  5. Step 5: Solve for x
    x = 2,473,983,924.72/51,638.80
  6. Step 6: Final answer
    x = 47,909.40

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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.