Home / 102,005.82-140,763.15-56,686.86

Finding the Fourth Proportional to 102,005.82, 140,763.15 and 56,686.86

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Solution

The fourth proportional to 102,005.82, 140,763.15 and 56,686.86 is: 78,225.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,005.82 : 140,763.15 = 56,686.86 : x
  2. Step 2: Convert to fraction form
    102,005.82/140,763.15 = 56,686.86/x
  3. Step 3: Cross multiply
    102,005.82x = 140,763.15 × 56,686.86
  4. Step 4: Simplify right side
    102,005.82x = 7,979,420,977.21
  5. Step 5: Solve for x
    x = 7,979,420,977.21/102,005.82
  6. Step 6: Final answer
    x = 78,225.15

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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.