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Finding the Fourth Proportional to 189,059.40, 260,916.12 and 104,176.80

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Solution

The fourth proportional to 189,059.40, 260,916.12 and 104,176.80 is: 143,771.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,059.40 : 260,916.12 = 104,176.80 : x
  2. Step 2: Convert to fraction form
    189,059.40/260,916.12 = 104,176.80/x
  3. Step 3: Cross multiply
    189,059.40x = 260,916.12 × 104,176.80
  4. Step 4: Simplify right side
    189,059.40x = 27,181,406,450.02
  5. Step 5: Solve for x
    x = 27,181,406,450.02/189,059.40
  6. Step 6: Final answer
    x = 143,771.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.