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Finding the Fourth Proportional to 100,751.99, 139,037.74 and 55,429

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Solution

The fourth proportional to 100,751.99, 139,037.74 and 55,429 is: 76,492.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.99 : 139,037.74 = 55,429 : x
  2. Step 2: Convert to fraction form
    100,751.99/139,037.74 = 55,429/x
  3. Step 3: Cross multiply
    100,751.99x = 139,037.74 × 55,429
  4. Step 4: Simplify right side
    100,751.99x = 7,706,722,890.46
  5. Step 5: Solve for x
    x = 7,706,722,890.46/100,751.99
  6. Step 6: Final answer
    x = 76,492.02

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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.