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Finding the Fourth Proportional to 123,245.65, 170,079.95 and 72,259.70

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Solution

The fourth proportional to 123,245.65, 170,079.95 and 72,259.70 is: 99,718.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,245.65 : 170,079.95 = 72,259.70 : x
  2. Step 2: Convert to fraction form
    123,245.65/170,079.95 = 72,259.70/x
  3. Step 3: Cross multiply
    123,245.65x = 170,079.95 × 72,259.70
  4. Step 4: Simplify right side
    123,245.65x = 12,289,925,493.26
  5. Step 5: Solve for x
    x = 12,289,925,493.26/123,245.65
  6. Step 6: Final answer
    x = 99,718.94

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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.