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Finding the Fourth Proportional to 100,900.49, 139,237.53 and 55,577.50

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Solution

The fourth proportional to 100,900.49, 139,237.53 and 55,577.50 is: 76,694.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,900.49 : 139,237.53 = 55,577.50 : x
  2. Step 2: Convert to fraction form
    100,900.49/139,237.53 = 55,577.50/x
  3. Step 3: Cross multiply
    100,900.49x = 139,237.53 × 55,577.50
  4. Step 4: Simplify right side
    100,900.49x = 7,738,473,127.39
  5. Step 5: Solve for x
    x = 7,738,473,127.39/100,900.49
  6. Step 6: Final answer
    x = 76,694.11

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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.