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Finding the Fourth Proportional to 137,205.98, 205,808.98 and 90,447.92

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Solution

The fourth proportional to 137,205.98, 205,808.98 and 90,447.92 is: 135,671.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,205.98 : 205,808.98 = 90,447.92 : x
  2. Step 2: Convert to fraction form
    137,205.98/205,808.98 = 90,447.92/x
  3. Step 3: Cross multiply
    137,205.98x = 205,808.98 × 90,447.92
  4. Step 4: Simplify right side
    137,205.98x = 18,614,994,158.32
  5. Step 5: Solve for x
    x = 18,614,994,158.32/137,205.98
  6. Step 6: Final answer
    x = 135,671.89

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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.