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Finding the Fourth Proportional to 289,521.63, 434,340.45 and 99,988.92

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Solution

The fourth proportional to 289,521.63, 434,340.45 and 99,988.92 is: 150,003.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,521.63 : 434,340.45 = 99,988.92 : x
  2. Step 2: Convert to fraction form
    289,521.63/434,340.45 = 99,988.92/x
  3. Step 3: Cross multiply
    289,521.63x = 434,340.45 × 99,988.92
  4. Step 4: Simplify right side
    289,521.63x = 43,429,232,507.81
  5. Step 5: Solve for x
    x = 43,429,232,507.81/289,521.63
  6. Step 6: Final answer
    x = 150,003.41

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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.