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Finding the Fourth Proportional to 137,197.60, 189,076.21 and 98,890.92

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Solution

The fourth proportional to 137,197.60, 189,076.21 and 98,890.92 is: 136,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,197.60 : 189,076.21 = 98,890.92 : x
  2. Step 2: Convert to fraction form
    137,197.60/189,076.21 = 98,890.92/x
  3. Step 3: Cross multiply
    137,197.60x = 189,076.21 × 98,890.92
  4. Step 4: Simplify right side
    137,197.60x = 18,697,920,109.79
  5. Step 5: Solve for x
    x = 18,697,920,109.79/137,197.60
  6. Step 6: Final answer
    x = 136,284.60

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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.