Home / 74,657.10-102,990.50-47,778.06

Finding the Fourth Proportional to 74,657.10, 102,990.50 and 47,778.06

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Solution

The fourth proportional to 74,657.10, 102,990.50 and 47,778.06 is: 65,910.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,657.10 : 102,990.50 = 47,778.06 : x
  2. Step 2: Convert to fraction form
    74,657.10/102,990.50 = 47,778.06/x
  3. Step 3: Cross multiply
    74,657.10x = 102,990.50 × 47,778.06
  4. Step 4: Simplify right side
    74,657.10x = 4,920,686,288.43
  5. Step 5: Solve for x
    x = 4,920,686,288.43/74,657.10
  6. Step 6: Final answer
    x = 65,910.49

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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.