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Finding the Fourth Proportional to 133,049.04, 183,609.40 and 78,603

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Solution

The fourth proportional to 133,049.04, 183,609.40 and 78,603 is: 108,473.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,049.04 : 183,609.40 = 78,603 : x
  2. Step 2: Convert to fraction form
    133,049.04/183,609.40 = 78,603/x
  3. Step 3: Cross multiply
    133,049.04x = 183,609.40 × 78,603
  4. Step 4: Simplify right side
    133,049.04x = 14,432,249,668.20
  5. Step 5: Solve for x
    x = 14,432,249,668.20/133,049.04
  6. Step 6: Final answer
    x = 108,473.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.