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Finding the Fourth Proportional to 139,886.94, 193,037.93 and 79,457.40

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Solution

The fourth proportional to 139,886.94, 193,037.93 and 79,457.40 is: 109,647.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,886.94 : 193,037.93 = 79,457.40 : x
  2. Step 2: Convert to fraction form
    139,886.94/193,037.93 = 79,457.40/x
  3. Step 3: Cross multiply
    139,886.94x = 193,037.93 × 79,457.40
  4. Step 4: Simplify right side
    139,886.94x = 15,338,290,656.71
  5. Step 5: Solve for x
    x = 15,338,290,656.71/139,886.94
  6. Step 6: Final answer
    x = 109,647.77

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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.