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Finding the Fourth Proportional to 90,957.48, 136,429.56 and 28,645.80

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Solution

The fourth proportional to 90,957.48, 136,429.56 and 28,645.80 is: 42,966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,957.48 : 136,429.56 = 28,645.80 : x
  2. Step 2: Convert to fraction form
    90,957.48/136,429.56 = 28,645.80/x
  3. Step 3: Cross multiply
    90,957.48x = 136,429.56 × 28,645.80
  4. Step 4: Simplify right side
    90,957.48x = 3,908,133,889.85
  5. Step 5: Solve for x
    x = 3,908,133,889.85/90,957.48
  6. Step 6: Final answer
    x = 42,966.60

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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.