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Finding the Fourth Proportional to 423,530.31, 635,160.74 and 139,155.32

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Solution

The fourth proportional to 423,530.31, 635,160.74 and 139,155.32 is: 208,688.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,530.31 : 635,160.74 = 139,155.32 : x
  2. Step 2: Convert to fraction form
    423,530.31/635,160.74 = 139,155.32/x
  3. Step 3: Cross multiply
    423,530.31x = 635,160.74 × 139,155.32
  4. Step 4: Simplify right side
    423,530.31x = 88,385,992,154.56
  5. Step 5: Solve for x
    x = 88,385,992,154.56/423,530.31
  6. Step 6: Final answer
    x = 208,688.71

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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.