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Finding the Fourth Proportional to 55,788.80, 76,989.08 and 30,638.30

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Solution

The fourth proportional to 55,788.80, 76,989.08 and 30,638.30 is: 42,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,788.80 : 76,989.08 = 30,638.30 : x
  2. Step 2: Convert to fraction form
    55,788.80/76,989.08 = 30,638.30/x
  3. Step 3: Cross multiply
    55,788.80x = 76,989.08 × 30,638.30
  4. Step 4: Simplify right side
    55,788.80x = 2,358,814,221.41
  5. Step 5: Solve for x
    x = 2,358,814,221.41/55,788.80
  6. Step 6: Final answer
    x = 42,281.15

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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.