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Finding the Fourth Proportional to 123,154.51, 169,955.11 and 72,155.04

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Solution

The fourth proportional to 123,154.51, 169,955.11 and 72,155.04 is: 99,575.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,154.51 : 169,955.11 = 72,155.04 : x
  2. Step 2: Convert to fraction form
    123,154.51/169,955.11 = 72,155.04/x
  3. Step 3: Cross multiply
    123,154.51x = 169,955.11 × 72,155.04
  4. Step 4: Simplify right side
    123,154.51x = 12,263,116,730.09
  5. Step 5: Solve for x
    x = 12,263,116,730.09/123,154.51
  6. Step 6: Final answer
    x = 99,575.05

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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.