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Finding the Fourth Proportional to 145,814.80, 218,722.20 and 72,086.80

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Solution

The fourth proportional to 145,814.80, 218,722.20 and 72,086.80 is: 108,130.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,814.80 : 218,722.20 = 72,086.80 : x
  2. Step 2: Convert to fraction form
    145,814.80/218,722.20 = 72,086.80/x
  3. Step 3: Cross multiply
    145,814.80x = 218,722.20 × 72,086.80
  4. Step 4: Simplify right side
    145,814.80x = 15,766,983,486.96
  5. Step 5: Solve for x
    x = 15,766,983,486.96/145,814.80
  6. Step 6: Final answer
    x = 108,130.20

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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.