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Finding the Fourth Proportional to 100,855.70, 151,283.55 and 89,969.30

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Solution

The fourth proportional to 100,855.70, 151,283.55 and 89,969.30 is: 134,953.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,855.70 : 151,283.55 = 89,969.30 : x
  2. Step 2: Convert to fraction form
    100,855.70/151,283.55 = 89,969.30/x
  3. Step 3: Cross multiply
    100,855.70x = 151,283.55 × 89,969.30
  4. Step 4: Simplify right side
    100,855.70x = 13,610,875,095.02
  5. Step 5: Solve for x
    x = 13,610,875,095.02/100,855.70
  6. Step 6: Final answer
    x = 134,953.95

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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.