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Finding the Fourth Proportional to 123,316.14, 170,179.68 and 74,901.72

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Solution

The fourth proportional to 123,316.14, 170,179.68 and 74,901.72 is: 103,366.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,316.14 : 170,179.68 = 74,901.72 : x
  2. Step 2: Convert to fraction form
    123,316.14/170,179.68 = 74,901.72/x
  3. Step 3: Cross multiply
    123,316.14x = 170,179.68 × 74,901.72
  4. Step 4: Simplify right side
    123,316.14x = 12,746,750,741.05
  5. Step 5: Solve for x
    x = 12,746,750,741.05/123,316.14
  6. Step 6: Final answer
    x = 103,366.44

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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.