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Finding the Fourth Proportional to 139,459.08, 209,071.08 and 60,513.96

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Solution

The fourth proportional to 139,459.08, 209,071.08 and 60,513.96 is: 90,719.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,459.08 : 209,071.08 = 60,513.96 : x
  2. Step 2: Convert to fraction form
    139,459.08/209,071.08 = 60,513.96/x
  3. Step 3: Cross multiply
    139,459.08x = 209,071.08 × 60,513.96
  4. Step 4: Simplify right side
    139,459.08x = 12,651,718,972.28
  5. Step 5: Solve for x
    x = 12,651,718,972.28/139,459.08
  6. Step 6: Final answer
    x = 90,719.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.