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Finding the Fourth Proportional to 423,466.28, 635,065.55 and 139,110.11

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Solution

The fourth proportional to 423,466.28, 635,065.55 and 139,110.11 is: 208,621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,466.28 : 635,065.55 = 139,110.11 : x
  2. Step 2: Convert to fraction form
    423,466.28/635,065.55 = 139,110.11/x
  3. Step 3: Cross multiply
    423,466.28x = 635,065.55 × 139,110.11
  4. Step 4: Simplify right side
    423,466.28x = 88,344,034,646.83
  5. Step 5: Solve for x
    x = 88,344,034,646.83/423,466.28
  6. Step 6: Final answer
    x = 208,621.18

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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.