Home / 77,981.37-107,614.32-42,171.40

Finding the Fourth Proportional to 77,981.37, 107,614.32 and 42,171.40

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Solution

The fourth proportional to 77,981.37, 107,614.32 and 42,171.40 is: 58,196.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,981.37 : 107,614.32 = 42,171.40 : x
  2. Step 2: Convert to fraction form
    77,981.37/107,614.32 = 42,171.40/x
  3. Step 3: Cross multiply
    77,981.37x = 107,614.32 × 42,171.40
  4. Step 4: Simplify right side
    77,981.37x = 4,538,246,534.45
  5. Step 5: Solve for x
    x = 4,538,246,534.45/77,981.37
  6. Step 6: Final answer
    x = 58,196.55

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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.