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Finding the Fourth Proportional to 76,992.40, 115,488.60 and 42,000.40

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Solution

The fourth proportional to 76,992.40, 115,488.60 and 42,000.40 is: 63,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,992.40 : 115,488.60 = 42,000.40 : x
  2. Step 2: Convert to fraction form
    76,992.40/115,488.60 = 42,000.40/x
  3. Step 3: Cross multiply
    76,992.40x = 115,488.60 × 42,000.40
  4. Step 4: Simplify right side
    76,992.40x = 4,850,567,395.44
  5. Step 5: Solve for x
    x = 4,850,567,395.44/76,992.40
  6. Step 6: Final answer
    x = 63,000.60

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1.5x scale

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.