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Finding the Fourth Proportional to 145,418.40, 218,127.60 and 144,496.80

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Solution

The fourth proportional to 145,418.40, 218,127.60 and 144,496.80 is: 216,745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,418.40 : 218,127.60 = 144,496.80 : x
  2. Step 2: Convert to fraction form
    145,418.40/218,127.60 = 144,496.80/x
  3. Step 3: Cross multiply
    145,418.40x = 218,127.60 × 144,496.80
  4. Step 4: Simplify right side
    145,418.40x = 31,518,740,191.68
  5. Step 5: Solve for x
    x = 31,518,740,191.68/145,418.40
  6. Step 6: Final answer
    x = 216,745.20

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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.