Home / 102,005.10-140,764.21-56,681.90

Finding the Fourth Proportional to 102,005.10, 140,764.21 and 56,681.90

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Solution

The fourth proportional to 102,005.10, 140,764.21 and 56,681.90 is: 78,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,005.10 : 140,764.21 = 56,681.90 : x
  2. Step 2: Convert to fraction form
    102,005.10/140,764.21 = 56,681.90/x
  3. Step 3: Cross multiply
    102,005.10x = 140,764.21 × 56,681.90
  4. Step 4: Simplify right side
    102,005.10x = 7,978,782,874.80
  5. Step 5: Solve for x
    x = 7,978,782,874.80/102,005.10
  6. Step 6: Final answer
    x = 78,219.45

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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.