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Finding the Fourth Proportional to 55,630.12, 76,728.90 and 40,527.40

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Solution

The fourth proportional to 55,630.12, 76,728.90 and 40,527.40 is: 55,898.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,630.12 : 76,728.90 = 40,527.40 : x
  2. Step 2: Convert to fraction form
    55,630.12/76,728.90 = 40,527.40/x
  3. Step 3: Cross multiply
    55,630.12x = 76,728.90 × 40,527.40
  4. Step 4: Simplify right side
    55,630.12x = 3,109,622,821.86
  5. Step 5: Solve for x
    x = 3,109,622,821.86/55,630.12
  6. Step 6: Final answer
    x = 55,898.19

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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.