Home / 77,001.20-115,404.60-56,200.40

Finding the Fourth Proportional to 77,001.20, 115,404.60 and 56,200.40

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Solution

The fourth proportional to 77,001.20, 115,404.60 and 56,200.40 is: 84,229.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,001.20 : 115,404.60 = 56,200.40 : x
  2. Step 2: Convert to fraction form
    77,001.20/115,404.60 = 56,200.40/x
  3. Step 3: Cross multiply
    77,001.20x = 115,404.60 × 56,200.40
  4. Step 4: Simplify right side
    77,001.20x = 6,485,784,681.84
  5. Step 5: Solve for x
    x = 6,485,784,681.84/77,001.20
  6. Step 6: Final answer
    x = 84,229.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.