Home / 102,012.18-140,781.03-56,689.98

Finding the Fourth Proportional to 102,012.18, 140,781.03 and 56,689.98

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Solution

The fourth proportional to 102,012.18, 140,781.03 and 56,689.98 is: 78,234.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,012.18 : 140,781.03 = 56,689.98 : x
  2. Step 2: Convert to fraction form
    102,012.18/140,781.03 = 56,689.98/x
  3. Step 3: Cross multiply
    102,012.18x = 140,781.03 × 56,689.98
  4. Step 4: Simplify right side
    102,012.18x = 7,980,873,775.08
  5. Step 5: Solve for x
    x = 7,980,873,775.08/102,012.18
  6. Step 6: Final answer
    x = 78,234.52

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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.