Home / 289,499.12-434,234.78-79,137.53

Finding the Fourth Proportional to 289,499.12, 434,234.78 and 79,137.53

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Solution

The fourth proportional to 289,499.12, 434,234.78 and 79,137.53 is: 118,702.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,499.12 : 434,234.78 = 79,137.53 : x
  2. Step 2: Convert to fraction form
    289,499.12/434,234.78 = 79,137.53/x
  3. Step 3: Cross multiply
    289,499.12x = 434,234.78 × 79,137.53
  4. Step 4: Simplify right side
    289,499.12x = 34,364,267,533.61
  5. Step 5: Solve for x
    x = 34,364,267,533.61/289,499.12
  6. Step 6: Final answer
    x = 118,702.49

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1.5x scale

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.