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Finding the Fourth Proportional to 55,423, 76,486.98 and 31,550.68

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Solution

The fourth proportional to 55,423, 76,486.98 and 31,550.68 is: 43,541.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,423 : 76,486.98 = 31,550.68 : x
  2. Step 2: Convert to fraction form
    55,423/76,486.98 = 31,550.68/x
  3. Step 3: Cross multiply
    55,423x = 76,486.98 × 31,550.68
  4. Step 4: Simplify right side
    55,423x = 2,413,216,230.15
  5. Step 5: Solve for x
    x = 2,413,216,230.15/55,423
  6. Step 6: Final answer
    x = 43,541.78

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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.