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Finding the Fourth Proportional to 55,684.40, 76,418.40 and 55,290.74

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Solution

The fourth proportional to 55,684.40, 76,418.40 and 55,290.74 is: 75,878.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,684.40 : 76,418.40 = 55,290.74 : x
  2. Step 2: Convert to fraction form
    55,684.40/76,418.40 = 55,290.74/x
  3. Step 3: Cross multiply
    55,684.40x = 76,418.40 × 55,290.74
  4. Step 4: Simplify right side
    55,684.40x = 4,225,229,710.86
  5. Step 5: Solve for x
    x = 4,225,229,710.86/55,684.40
  6. Step 6: Final answer
    x = 75,878.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.