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Finding the Fourth Proportional to 100,762.95, 139,050 and 55,440.97

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Solution

The fourth proportional to 100,762.95, 139,050 and 55,440.97 is: 76,506.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,762.95 : 139,050 = 55,440.97 : x
  2. Step 2: Convert to fraction form
    100,762.95/139,050 = 55,440.97/x
  3. Step 3: Cross multiply
    100,762.95x = 139,050 × 55,440.97
  4. Step 4: Simplify right side
    100,762.95x = 7,709,066,530.88
  5. Step 5: Solve for x
    x = 7,709,066,530.88/100,762.95
  6. Step 6: Final answer
    x = 76,506.96

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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.