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Finding the Fourth Proportional to 145,757.48, 218,661.20 and 66,878.48

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Solution

The fourth proportional to 145,757.48, 218,661.20 and 66,878.48 is: 100,329.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,757.48 : 218,661.20 = 66,878.48 : x
  2. Step 2: Convert to fraction form
    145,757.48/218,661.20 = 66,878.48/x
  3. Step 3: Cross multiply
    145,757.48x = 218,661.20 × 66,878.48
  4. Step 4: Simplify right side
    145,757.48x = 14,623,728,690.98
  5. Step 5: Solve for x
    x = 14,623,728,690.98/145,757.48
  6. Step 6: Final answer
    x = 100,329.18

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1.5x scale

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.