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Finding the Fourth Proportional to 107,915.60, 161,873.40 and 90,419.60

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Solution

The fourth proportional to 107,915.60, 161,873.40 and 90,419.60 is: 135,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,915.60 : 161,873.40 = 90,419.60 : x
  2. Step 2: Convert to fraction form
    107,915.60/161,873.40 = 90,419.60/x
  3. Step 3: Cross multiply
    107,915.60x = 161,873.40 × 90,419.60
  4. Step 4: Simplify right side
    107,915.60x = 14,636,528,078.64
  5. Step 5: Solve for x
    x = 14,636,528,078.64/107,915.60
  6. Step 6: Final answer
    x = 135,629.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.