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Finding the Fourth Proportional to 289,398.59, 434,127.95 and 79,036.50

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Solution

The fourth proportional to 289,398.59, 434,127.95 and 79,036.50 is: 118,562.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,398.59 : 434,127.95 = 79,036.50 : x
  2. Step 2: Convert to fraction form
    289,398.59/434,127.95 = 79,036.50/x
  3. Step 3: Cross multiply
    289,398.59x = 434,127.95 × 79,036.50
  4. Step 4: Simplify right side
    289,398.59x = 34,311,953,324.99
  5. Step 5: Solve for x
    x = 34,311,953,324.99/289,398.59
  6. Step 6: Final answer
    x = 118,562.96

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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.