Home / 77,971.13-107,600.08-42,161.05

Finding the Fourth Proportional to 77,971.13, 107,600.08 and 42,161.05

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Solution

The fourth proportional to 77,971.13, 107,600.08 and 42,161.05 is: 58,182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,971.13 : 107,600.08 = 42,161.05 : x
  2. Step 2: Convert to fraction form
    77,971.13/107,600.08 = 42,161.05/x
  3. Step 3: Cross multiply
    77,971.13x = 107,600.08 × 42,161.05
  4. Step 4: Simplify right side
    77,971.13x = 4,536,532,142.08
  5. Step 5: Solve for x
    x = 4,536,532,142.08/77,971.13
  6. Step 6: Final answer
    x = 58,182.21

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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.