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Finding the Fourth Proportional to 123,716.58, 170,718.48 and 72,730.98

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Solution

The fourth proportional to 123,716.58, 170,718.48 and 72,730.98 is: 100,362.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,716.58 : 170,718.48 = 72,730.98 : x
  2. Step 2: Convert to fraction form
    123,716.58/170,718.48 = 72,730.98/x
  3. Step 3: Cross multiply
    123,716.58x = 170,718.48 × 72,730.98
  4. Step 4: Simplify right side
    123,716.58x = 12,416,522,354.51
  5. Step 5: Solve for x
    x = 12,416,522,354.51/123,716.58
  6. Step 6: Final answer
    x = 100,362.64

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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.