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Finding the Fourth Proportional to 55,520, 76,617.76 and 30,369.28

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Solution

The fourth proportional to 55,520, 76,617.76 and 30,369.28 is: 41,909.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,520 : 76,617.76 = 30,369.28 : x
  2. Step 2: Convert to fraction form
    55,520/76,617.76 = 30,369.28/x
  3. Step 3: Cross multiply
    55,520x = 76,617.76 × 30,369.28
  4. Step 4: Simplify right side
    55,520x = 2,326,826,206.41
  5. Step 5: Solve for x
    x = 2,326,826,206.41/55,520
  6. Step 6: Final answer
    x = 41,909.69

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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.