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Finding the Fourth Proportional to 100,977.64, 139,347.28 and 55,037.68

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Solution

The fourth proportional to 100,977.64, 139,347.28 and 55,037.68 is: 75,950.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,977.64 : 139,347.28 = 55,037.68 : x
  2. Step 2: Convert to fraction form
    100,977.64/139,347.28 = 55,037.68/x
  3. Step 3: Cross multiply
    100,977.64x = 139,347.28 × 55,037.68
  4. Step 4: Simplify right side
    100,977.64x = 7,669,351,005.51
  5. Step 5: Solve for x
    x = 7,669,351,005.51/100,977.64
  6. Step 6: Final answer
    x = 75,950.98

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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.