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Finding the Fourth Proportional to 145,412.40, 218,118.60 and 137,247.60

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Solution

The fourth proportional to 145,412.40, 218,118.60 and 137,247.60 is: 205,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,412.40 : 218,118.60 = 137,247.60 : x
  2. Step 2: Convert to fraction form
    145,412.40/218,118.60 = 137,247.60/x
  3. Step 3: Cross multiply
    145,412.40x = 218,118.60 × 137,247.60
  4. Step 4: Simplify right side
    145,412.40x = 29,936,254,365.36
  5. Step 5: Solve for x
    x = 29,936,254,365.36/145,412.40
  6. Step 6: Final answer
    x = 205,871.40

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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.