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Finding the Fourth Proportional to 121,603.20, 182,404.80 and 87,923.40

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Solution

The fourth proportional to 121,603.20, 182,404.80 and 87,923.40 is: 131,885.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,603.20 : 182,404.80 = 87,923.40 : x
  2. Step 2: Convert to fraction form
    121,603.20/182,404.80 = 87,923.40/x
  3. Step 3: Cross multiply
    121,603.20x = 182,404.80 × 87,923.40
  4. Step 4: Simplify right side
    121,603.20x = 16,037,650,192.32
  5. Step 5: Solve for x
    x = 16,037,650,192.32/121,603.20
  6. Step 6: Final answer
    x = 131,885.10

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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.