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Finding the Fourth Proportional to 124,780, 172,196.18 and 68,191.32

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Solution

The fourth proportional to 124,780, 172,196.18 and 68,191.32 is: 94,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,780 : 172,196.18 = 68,191.32 : x
  2. Step 2: Convert to fraction form
    124,780/172,196.18 = 68,191.32/x
  3. Step 3: Cross multiply
    124,780x = 172,196.18 × 68,191.32
  4. Step 4: Simplify right side
    124,780x = 11,742,284,813.16
  5. Step 5: Solve for x
    x = 11,742,284,813.16/124,780
  6. Step 6: Final answer
    x = 94,103.90

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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.