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Finding the Fourth Proportional to 139,097.76, 191,955.12 and 75,435.12

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Solution

The fourth proportional to 139,097.76, 191,955.12 and 75,435.12 is: 104,100.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,097.76 : 191,955.12 = 75,435.12 : x
  2. Step 2: Convert to fraction form
    139,097.76/191,955.12 = 75,435.12/x
  3. Step 3: Cross multiply
    139,097.76x = 191,955.12 × 75,435.12
  4. Step 4: Simplify right side
    139,097.76x = 14,480,157,511.81
  5. Step 5: Solve for x
    x = 14,480,157,511.81/139,097.76
  6. Step 6: Final answer
    x = 104,100.58

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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.