Home / 123,359.21-170,237.12-72,372.84

Finding the Fourth Proportional to 123,359.21, 170,237.12 and 72,372.84

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Solution

The fourth proportional to 123,359.21, 170,237.12 and 72,372.84 is: 99,875.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,359.21 : 170,237.12 = 72,372.84 : x
  2. Step 2: Convert to fraction form
    123,359.21/170,237.12 = 72,372.84/x
  3. Step 3: Cross multiply
    123,359.21x = 170,237.12 × 72,372.84
  4. Step 4: Simplify right side
    123,359.21x = 12,320,543,485.96
  5. Step 5: Solve for x
    x = 12,320,543,485.96/123,359.21
  6. Step 6: Final answer
    x = 99,875.35

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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.