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Finding the Fourth Proportional to 107,308.68, 148,078.80 and 64,890.60

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Solution

The fourth proportional to 107,308.68, 148,078.80 and 64,890.60 is: 89,544.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,308.68 : 148,078.80 = 64,890.60 : x
  2. Step 2: Convert to fraction form
    107,308.68/148,078.80 = 64,890.60/x
  3. Step 3: Cross multiply
    107,308.68x = 148,078.80 × 64,890.60
  4. Step 4: Simplify right side
    107,308.68x = 9,608,922,179.28
  5. Step 5: Solve for x
    x = 9,608,922,179.28/107,308.68
  6. Step 6: Final answer
    x = 89,544.69

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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.