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Finding the Fourth Proportional to 148,599.42, 205,063.17 and 90,434.31

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Solution

The fourth proportional to 148,599.42, 205,063.17 and 90,434.31 is: 124,796.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,599.42 : 205,063.17 = 90,434.31 : x
  2. Step 2: Convert to fraction form
    148,599.42/205,063.17 = 90,434.31/x
  3. Step 3: Cross multiply
    148,599.42x = 205,063.17 × 90,434.31
  4. Step 4: Simplify right side
    148,599.42x = 18,544,746,285.36
  5. Step 5: Solve for x
    x = 18,544,746,285.36/148,599.42
  6. Step 6: Final answer
    x = 124,796.90

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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.