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Finding the Fourth Proportional to 70,416.80, 105,430.80 and 54,864.80

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Solution

The fourth proportional to 70,416.80, 105,430.80 and 54,864.80 is: 82,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,416.80 : 105,430.80 = 54,864.80 : x
  2. Step 2: Convert to fraction form
    70,416.80/105,430.80 = 54,864.80/x
  3. Step 3: Cross multiply
    70,416.80x = 105,430.80 × 54,864.80
  4. Step 4: Simplify right side
    70,416.80x = 5,784,439,755.84
  5. Step 5: Solve for x
    x = 5,784,439,755.84/70,416.80
  6. Step 6: Final answer
    x = 82,145.73

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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.