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Finding the Fourth Proportional to 423,529.56, 635,159.62 and 139,154.57

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Solution

The fourth proportional to 423,529.56, 635,159.62 and 139,154.57 is: 208,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,529.56 : 635,159.62 = 139,154.57 : x
  2. Step 2: Convert to fraction form
    423,529.56/635,159.62 = 139,154.57/x
  3. Step 3: Cross multiply
    423,529.56x = 635,159.62 × 139,154.57
  4. Step 4: Simplify right side
    423,529.56x = 88,385,360,278.78
  5. Step 5: Solve for x
    x = 88,385,360,278.78/423,529.56
  6. Step 6: Final answer
    x = 208,687.58

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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.