Home / 76,905.59-106,129.58-42,912

Finding the Fourth Proportional to 76,905.59, 106,129.58 and 42,912

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Solution

The fourth proportional to 76,905.59, 106,129.58 and 42,912 is: 59,218.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,905.59 : 106,129.58 = 42,912 : x
  2. Step 2: Convert to fraction form
    76,905.59/106,129.58 = 42,912/x
  3. Step 3: Cross multiply
    76,905.59x = 106,129.58 × 42,912
  4. Step 4: Simplify right side
    76,905.59x = 4,554,232,322.40
  5. Step 5: Solve for x
    x = 4,554,232,322.40/76,905.59
  6. Step 6: Final answer
    x = 59,218.49

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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.