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Finding the Fourth Proportional to 145,635.17, 217,412.81 and 123,208.90

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Solution

The fourth proportional to 145,635.17, 217,412.81 and 123,208.90 is: 183,933.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,635.17 : 217,412.81 = 123,208.90 : x
  2. Step 2: Convert to fraction form
    145,635.17/217,412.81 = 123,208.90/x
  3. Step 3: Cross multiply
    145,635.17x = 217,412.81 × 123,208.90
  4. Step 4: Simplify right side
    145,635.17x = 26,787,192,468.47
  5. Step 5: Solve for x
    x = 26,787,192,468.47/145,635.17
  6. Step 6: Final answer
    x = 183,933.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.