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Finding the Fourth Proportional to 154,648.64, 213,411.64 and 90,113.88

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Solution

The fourth proportional to 154,648.64, 213,411.64 and 90,113.88 is: 124,355.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,648.64 : 213,411.64 = 90,113.88 : x
  2. Step 2: Convert to fraction form
    154,648.64/213,411.64 = 90,113.88/x
  3. Step 3: Cross multiply
    154,648.64x = 213,411.64 × 90,113.88
  4. Step 4: Simplify right side
    154,648.64x = 19,231,350,917.56
  5. Step 5: Solve for x
    x = 19,231,350,917.56/154,648.64
  6. Step 6: Final answer
    x = 124,355.12

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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.