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Finding the Fourth Proportional to 219,317.40, 329,121.90 and 124,547.40

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Solution

The fourth proportional to 219,317.40, 329,121.90 and 124,547.40 is: 186,903.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,317.40 : 329,121.90 = 124,547.40 : x
  2. Step 2: Convert to fraction form
    219,317.40/329,121.90 = 124,547.40/x
  3. Step 3: Cross multiply
    219,317.40x = 329,121.90 × 124,547.40
  4. Step 4: Simplify right side
    219,317.40x = 40,991,276,928.06
  5. Step 5: Solve for x
    x = 40,991,276,928.06/219,317.40
  6. Step 6: Final answer
    x = 186,903.90

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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.