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Finding the Fourth Proportional to 145,457.78, 218,211.17 and 74,411.19

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Solution

The fourth proportional to 145,457.78, 218,211.17 and 74,411.19 is: 111,629.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,457.78 : 218,211.17 = 74,411.19 : x
  2. Step 2: Convert to fraction form
    145,457.78/218,211.17 = 74,411.19/x
  3. Step 3: Cross multiply
    145,457.78x = 218,211.17 × 74,411.19
  4. Step 4: Simplify right side
    145,457.78x = 16,237,352,458.94
  5. Step 5: Solve for x
    x = 16,237,352,458.94/145,457.78
  6. Step 6: Final answer
    x = 111,629.32

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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.