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Finding the Fourth Proportional to 145,710.66, 218,490.79 and 66,757.22

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Solution

The fourth proportional to 145,710.66, 218,490.79 and 66,757.22 is: 100,101.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,710.66 : 218,490.79 = 66,757.22 : x
  2. Step 2: Convert to fraction form
    145,710.66/218,490.79 = 66,757.22/x
  3. Step 3: Cross multiply
    145,710.66x = 218,490.79 × 66,757.22
  4. Step 4: Simplify right side
    145,710.66x = 14,585,837,736.00
  5. Step 5: Solve for x
    x = 14,585,837,736.00/145,710.66
  6. Step 6: Final answer
    x = 100,101.38

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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.