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Finding the Fourth Proportional to 289,399.59, 434,129.45 and 79,037.50

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Solution

The fourth proportional to 289,399.59, 434,129.45 and 79,037.50 is: 118,564.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,399.59 : 434,129.45 = 79,037.50 : x
  2. Step 2: Convert to fraction form
    289,399.59/434,129.45 = 79,037.50/x
  3. Step 3: Cross multiply
    289,399.59x = 434,129.45 × 79,037.50
  4. Step 4: Simplify right side
    289,399.59x = 34,312,506,404.38
  5. Step 5: Solve for x
    x = 34,312,506,404.38/289,399.59
  6. Step 6: Final answer
    x = 118,564.46

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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.