Home / 76,278.13-105,254.07-42,286.30

Finding the Fourth Proportional to 76,278.13, 105,254.07 and 42,286.30

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Solution

The fourth proportional to 76,278.13, 105,254.07 and 42,286.30 is: 58,349.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,278.13 : 105,254.07 = 42,286.30 : x
  2. Step 2: Convert to fraction form
    76,278.13/105,254.07 = 42,286.30/x
  3. Step 3: Cross multiply
    76,278.13x = 105,254.07 × 42,286.30
  4. Step 4: Simplify right side
    76,278.13x = 4,450,804,653.97
  5. Step 5: Solve for x
    x = 4,450,804,653.97/76,278.13
  6. Step 6: Final answer
    x = 58,349.69

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1.5x scale

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.