Home / 102,012.68-140,781.72-56,690.48

Finding the Fourth Proportional to 102,012.68, 140,781.72 and 56,690.48

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Solution

The fourth proportional to 102,012.68, 140,781.72 and 56,690.48 is: 78,235.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,012.68 : 140,781.72 = 56,690.48 : x
  2. Step 2: Convert to fraction form
    102,012.68/140,781.72 = 56,690.48/x
  3. Step 3: Cross multiply
    102,012.68x = 140,781.72 × 56,690.48
  4. Step 4: Simplify right side
    102,012.68x = 7,980,983,282.03
  5. Step 5: Solve for x
    x = 7,980,983,282.03/102,012.68
  6. Step 6: Final answer
    x = 78,235.21

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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.