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Finding the Fourth Proportional to 98,890.60, 148,335.90 and 87,226.60

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Solution

The fourth proportional to 98,890.60, 148,335.90 and 87,226.60 is: 130,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,890.60 : 148,335.90 = 87,226.60 : x
  2. Step 2: Convert to fraction form
    98,890.60/148,335.90 = 87,226.60/x
  3. Step 3: Cross multiply
    98,890.60x = 148,335.90 × 87,226.60
  4. Step 4: Simplify right side
    98,890.60x = 12,938,836,214.94
  5. Step 5: Solve for x
    x = 12,938,836,214.94/98,890.60
  6. Step 6: Final answer
    x = 130,839.90

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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.