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Finding the Fourth Proportional to 144,825.40, 217,140.90 and 69,981.40

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Solution

The fourth proportional to 144,825.40, 217,140.90 and 69,981.40 is: 104,925.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,825.40 : 217,140.90 = 69,981.40 : x
  2. Step 2: Convert to fraction form
    144,825.40/217,140.90 = 69,981.40/x
  3. Step 3: Cross multiply
    144,825.40x = 217,140.90 × 69,981.40
  4. Step 4: Simplify right side
    144,825.40x = 15,195,824,179.26
  5. Step 5: Solve for x
    x = 15,195,824,179.26/144,825.40
  6. Step 6: Final answer
    x = 104,925.13

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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.