Home / 102,109.81-140,900.75-56,780.47

Finding the Fourth Proportional to 102,109.81, 140,900.75 and 56,780.47

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Solution

The fourth proportional to 102,109.81, 140,900.75 and 56,780.47 is: 78,351.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,109.81 : 140,900.75 = 56,780.47 : x
  2. Step 2: Convert to fraction form
    102,109.81/140,900.75 = 56,780.47/x
  3. Step 3: Cross multiply
    102,109.81x = 140,900.75 × 56,780.47
  4. Step 4: Simplify right side
    102,109.81x = 8,000,410,172.20
  5. Step 5: Solve for x
    x = 8,000,410,172.20/102,109.81
  6. Step 6: Final answer
    x = 78,351.05

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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.