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Finding the Fourth Proportional to 145,329.60, 218,059.20 and 66,403.20

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Solution

The fourth proportional to 145,329.60, 218,059.20 and 66,403.20 is: 99,634.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,329.60 : 218,059.20 = 66,403.20 : x
  2. Step 2: Convert to fraction form
    145,329.60/218,059.20 = 66,403.20/x
  3. Step 3: Cross multiply
    145,329.60x = 218,059.20 × 66,403.20
  4. Step 4: Simplify right side
    145,329.60x = 14,479,828,669.44
  5. Step 5: Solve for x
    x = 14,479,828,669.44/145,329.60
  6. Step 6: Final answer
    x = 99,634.41

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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.