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Finding the Fourth Proportional to 145,943.68, 218,598.72 and 89,612.80

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Solution

The fourth proportional to 145,943.68, 218,598.72 and 89,612.80 is: 134,224.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,943.68 : 218,598.72 = 89,612.80 : x
  2. Step 2: Convert to fraction form
    145,943.68/218,598.72 = 89,612.80/x
  3. Step 3: Cross multiply
    145,943.68x = 218,598.72 × 89,612.80
  4. Step 4: Simplify right side
    145,943.68x = 19,589,243,375.62
  5. Step 5: Solve for x
    x = 19,589,243,375.62/145,943.68
  6. Step 6: Final answer
    x = 134,224.68

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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.