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Finding the Fourth Proportional to 123,860.99, 170,898.88 and 72,875.94

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Solution

The fourth proportional to 123,860.99, 170,898.88 and 72,875.94 is: 100,551.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,860.99 : 170,898.88 = 72,875.94 : x
  2. Step 2: Convert to fraction form
    123,860.99/170,898.88 = 72,875.94/x
  3. Step 3: Cross multiply
    123,860.99x = 170,898.88 × 72,875.94
  4. Step 4: Simplify right side
    123,860.99x = 12,454,416,524.95
  5. Step 5: Solve for x
    x = 12,454,416,524.95/123,860.99
  6. Step 6: Final answer
    x = 100,551.57

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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.