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Finding the Fourth Proportional to 145,322.40, 217,837.80 and 66,493.20

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Solution

The fourth proportional to 145,322.40, 217,837.80 and 66,493.20 is: 99,673.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,322.40 : 217,837.80 = 66,493.20 : x
  2. Step 2: Convert to fraction form
    145,322.40/217,837.80 = 66,493.20/x
  3. Step 3: Cross multiply
    145,322.40x = 217,837.80 × 66,493.20
  4. Step 4: Simplify right side
    145,322.40x = 14,484,732,402.96
  5. Step 5: Solve for x
    x = 14,484,732,402.96/145,322.40
  6. Step 6: Final answer
    x = 99,673.09

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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.