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Finding the Fourth Proportional to 423,700.15, 635,592.09 and 139,275.34

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Solution

The fourth proportional to 423,700.15, 635,592.09 and 139,275.34 is: 208,926.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,700.15 : 635,592.09 = 139,275.34 : x
  2. Step 2: Convert to fraction form
    423,700.15/635,592.09 = 139,275.34/x
  3. Step 3: Cross multiply
    423,700.15x = 635,592.09 × 139,275.34
  4. Step 4: Simplify right side
    423,700.15x = 88,522,302,083.85
  5. Step 5: Solve for x
    x = 88,522,302,083.85/423,700.15
  6. Step 6: Final answer
    x = 208,926.76

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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.