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Finding the Fourth Proportional to 72,144.86, 108,214.21 and 70,455.40

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Solution

The fourth proportional to 72,144.86, 108,214.21 and 70,455.40 is: 105,680.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.86 : 108,214.21 = 70,455.40 : x
  2. Step 2: Convert to fraction form
    72,144.86/108,214.21 = 70,455.40/x
  3. Step 3: Cross multiply
    72,144.86x = 108,214.21 × 70,455.40
  4. Step 4: Simplify right side
    72,144.86x = 7,624,275,723.52
  5. Step 5: Solve for x
    x = 7,624,275,723.52/72,144.86
  6. Step 6: Final answer
    x = 105,680.10

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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.