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Finding the Fourth Proportional to 192,402.10, 288,603.15 and 121,543.30

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Solution

The fourth proportional to 192,402.10, 288,603.15 and 121,543.30 is: 182,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,402.10 : 288,603.15 = 121,543.30 : x
  2. Step 2: Convert to fraction form
    192,402.10/288,603.15 = 121,543.30/x
  3. Step 3: Cross multiply
    192,402.10x = 288,603.15 × 121,543.30
  4. Step 4: Simplify right side
    192,402.10x = 35,077,779,241.40
  5. Step 5: Solve for x
    x = 35,077,779,241.40/192,402.10
  6. Step 6: Final answer
    x = 182,314.95

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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.