Home / 76,121.16-105,043.96-42,126.46

Finding the Fourth Proportional to 76,121.16, 105,043.96 and 42,126.46

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Solution

The fourth proportional to 76,121.16, 105,043.96 and 42,126.46 is: 58,132.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,121.16 : 105,043.96 = 42,126.46 : x
  2. Step 2: Convert to fraction form
    76,121.16/105,043.96 = 42,126.46/x
  3. Step 3: Cross multiply
    76,121.16x = 105,043.96 × 42,126.46
  4. Step 4: Simplify right side
    76,121.16x = 4,425,130,179.18
  5. Step 5: Solve for x
    x = 4,425,130,179.18/76,121.16
  6. Step 6: Final answer
    x = 58,132.72

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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.