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Finding the Fourth Proportional to 100,770.76, 139,063.78 and 56,058.76

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Solution

The fourth proportional to 100,770.76, 139,063.78 and 56,058.76 is: 77,361.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,770.76 : 139,063.78 = 56,058.76 : x
  2. Step 2: Convert to fraction form
    100,770.76/139,063.78 = 56,058.76/x
  3. Step 3: Cross multiply
    100,770.76x = 139,063.78 × 56,058.76
  4. Step 4: Simplify right side
    100,770.76x = 7,795,743,067.71
  5. Step 5: Solve for x
    x = 7,795,743,067.71/100,770.76
  6. Step 6: Final answer
    x = 77,361.16

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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.