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Finding the Fourth Proportional to 145,315.60, 218,112.60 and 75,245.20

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Solution

The fourth proportional to 145,315.60, 218,112.60 and 75,245.20 is: 112,939.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,315.60 : 218,112.60 = 75,245.20 : x
  2. Step 2: Convert to fraction form
    145,315.60/218,112.60 = 75,245.20/x
  3. Step 3: Cross multiply
    145,315.60x = 218,112.60 × 75,245.20
  4. Step 4: Simplify right side
    145,315.60x = 16,411,926,209.52
  5. Step 5: Solve for x
    x = 16,411,926,209.52/145,315.60
  6. Step 6: Final answer
    x = 112,939.88

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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.