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Finding the Fourth Proportional to 76,139.40, 105,054.66 and 44,290.20

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Solution

The fourth proportional to 76,139.40, 105,054.66 and 44,290.20 is: 61,110.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,139.40 : 105,054.66 = 44,290.20 : x
  2. Step 2: Convert to fraction form
    76,139.40/105,054.66 = 44,290.20/x
  3. Step 3: Cross multiply
    76,139.40x = 105,054.66 × 44,290.20
  4. Step 4: Simplify right side
    76,139.40x = 4,652,891,902.33
  5. Step 5: Solve for x
    x = 4,652,891,902.33/76,139.40
  6. Step 6: Final answer
    x = 61,110.17

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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.