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Finding the Fourth Proportional to 154,332, 213,005.43 and 90,669.78

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Solution

The fourth proportional to 154,332, 213,005.43 and 90,669.78 is: 125,140.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,332 : 213,005.43 = 90,669.78 : x
  2. Step 2: Convert to fraction form
    154,332/213,005.43 = 90,669.78/x
  3. Step 3: Cross multiply
    154,332x = 213,005.43 × 90,669.78
  4. Step 4: Simplify right side
    154,332x = 19,313,155,476.91
  5. Step 5: Solve for x
    x = 19,313,155,476.91/154,332
  6. Step 6: Final answer
    x = 125,140.32

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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.