Home / 55,781.50-76,979.01-30,631.54

Finding the Fourth Proportional to 55,781.50, 76,979.01 and 30,631.54

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Solution

The fourth proportional to 55,781.50, 76,979.01 and 30,631.54 is: 42,271.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,781.50 : 76,979.01 = 30,631.54 : x
  2. Step 2: Convert to fraction form
    55,781.50/76,979.01 = 30,631.54/x
  3. Step 3: Cross multiply
    55,781.50x = 76,979.01 × 30,631.54
  4. Step 4: Simplify right side
    55,781.50x = 2,357,985,623.98
  5. Step 5: Solve for x
    x = 2,357,985,623.98/55,781.50
  6. Step 6: Final answer
    x = 42,271.82

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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.