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Finding the Fourth Proportional to 423,528.81, 635,158.49 and 139,153.81

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Solution

The fourth proportional to 423,528.81, 635,158.49 and 139,153.81 is: 208,686.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,528.81 : 635,158.49 = 139,153.81 : x
  2. Step 2: Convert to fraction form
    423,528.81/635,158.49 = 139,153.81/x
  3. Step 3: Cross multiply
    423,528.81x = 635,158.49 × 139,153.81
  4. Step 4: Simplify right side
    423,528.81x = 88,384,725,694.44
  5. Step 5: Solve for x
    x = 88,384,725,694.44/423,528.81
  6. Step 6: Final answer
    x = 208,686.46

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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.