Home / 89,089.15-122,842.11-56,780.55

Finding the Fourth Proportional to 89,089.15, 122,842.11 and 56,780.55

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Solution

The fourth proportional to 89,089.15, 122,842.11 and 56,780.55 is: 78,292.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,089.15 : 122,842.11 = 56,780.55 : x
  2. Step 2: Convert to fraction form
    89,089.15/122,842.11 = 56,780.55/x
  3. Step 3: Cross multiply
    89,089.15x = 122,842.11 × 56,780.55
  4. Step 4: Simplify right side
    89,089.15x = 6,975,042,568.96
  5. Step 5: Solve for x
    x = 6,975,042,568.96/89,089.15
  6. Step 6: Final answer
    x = 78,292.84

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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.