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Finding the Fourth Proportional to 137,673.36, 206,509.68 and 90,915.12

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Solution

The fourth proportional to 137,673.36, 206,509.68 and 90,915.12 is: 136,372.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,673.36 : 206,509.68 = 90,915.12 : x
  2. Step 2: Convert to fraction form
    137,673.36/206,509.68 = 90,915.12/x
  3. Step 3: Cross multiply
    137,673.36x = 206,509.68 × 90,915.12
  4. Step 4: Simplify right side
    137,673.36x = 18,774,852,338.36
  5. Step 5: Solve for x
    x = 18,774,852,338.36/137,673.36
  6. Step 6: Final answer
    x = 136,372.44

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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.