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Finding the Fourth Proportional to 137,140.40, 206,056.20 and 87,244.40

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Solution

The fourth proportional to 137,140.40, 206,056.20 and 87,244.40 is: 131,086.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,140.40 : 206,056.20 = 87,244.40 : x
  2. Step 2: Convert to fraction form
    137,140.40/206,056.20 = 87,244.40/x
  3. Step 3: Cross multiply
    137,140.40x = 206,056.20 × 87,244.40
  4. Step 4: Simplify right side
    137,140.40x = 17,977,249,535.28
  5. Step 5: Solve for x
    x = 17,977,249,535.28/137,140.40
  6. Step 6: Final answer
    x = 131,086.46

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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.