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Finding the Fourth Proportional to 70,003.80, 105,005.70 and 61,693.20

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Solution

The fourth proportional to 70,003.80, 105,005.70 and 61,693.20 is: 92,539.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,003.80 : 105,005.70 = 61,693.20 : x
  2. Step 2: Convert to fraction form
    70,003.80/105,005.70 = 61,693.20/x
  3. Step 3: Cross multiply
    70,003.80x = 105,005.70 × 61,693.20
  4. Step 4: Simplify right side
    70,003.80x = 6,478,137,651.24
  5. Step 5: Solve for x
    x = 6,478,137,651.24/70,003.80
  6. Step 6: Final answer
    x = 92,539.80

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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.